diff --git a/poincare/Makefile b/poincare/Makefile
index 976ffb545..f9828e5fe 100644
--- a/poincare/Makefile
+++ b/poincare/Makefile
@@ -84,7 +84,6 @@ objs += $(addprefix poincare/src/,\
 
 objs += $(addprefix poincare/src/layout/,\
   absolute_value_layout.o\
-  baseline_relative_layout.o\
   bracket_layout.o\
   bracket_left_layout.o\
   bracket_left_right_layout.o\
@@ -94,8 +93,6 @@ objs += $(addprefix poincare/src/layout/,\
   condensed_sum_layout.o\
   conjugate_layout.o\
   dynamic_layout_hierarchy.o\
-  editable_baseline_relative_layout.o\
-  editable_string_layout.o\
   empty_layout.o\
   empty_visible_layout.o\
   expression_layout.o\
@@ -112,11 +109,7 @@ objs += $(addprefix poincare/src/layout/,\
   product_layout.o\
   sequence_layout.o\
   static_layout_hierarchy.o\
-  string_layout.o\
   sum_layout.o\
-  uneditable_horizontal_trio_layout.o\
-  uneditable_parenthesis_left_layout.o\
-  uneditable_parenthesis_right_layout.o\
   vertical_offset_layout.o\
 )
 
diff --git a/poincare/src/layout/baseline_relative_layout.cpp b/poincare/src/layout/baseline_relative_layout.cpp
deleted file mode 100644
index 824c1c286..000000000
--- a/poincare/src/layout/baseline_relative_layout.cpp
+++ /dev/null
@@ -1,134 +0,0 @@
-#include "baseline_relative_layout.h"
-#include "empty_visible_layout.h"
-#include <poincare/expression_layout_cursor.h>
-#include <poincare/layout_engine.h>
-#include <string.h>
-#include <assert.h>
-
-namespace Poincare {
-
-BaselineRelativeLayout::BaselineRelativeLayout(ExpressionLayout * base, ExpressionLayout * indice, Type type, bool cloneOperands) :
-  StaticLayoutHierarchy(base, indice, cloneOperands),
-  m_type(type)
-{
-}
-
-ExpressionLayout * BaselineRelativeLayout::clone() const {
-  BaselineRelativeLayout * layout = new BaselineRelativeLayout(const_cast<BaselineRelativeLayout *>(this)->baseLayout(), const_cast<BaselineRelativeLayout *>(this)->indiceLayout(), m_type, true);
-  return layout;
-}
-
-void BaselineRelativeLayout::backspaceAtCursor(ExpressionLayoutCursor * cursor) {
-  if (cursor->pointedExpressionLayout() == indiceLayout()
-      || (cursor->pointedExpressionLayout() == this
-        && cursor->position() == ExpressionLayoutCursor::Position::Right))
-  {
-    ExpressionLayout * previousParent = m_parent;
-    int indexInParent = previousParent->indexOfChild(this);
-    replaceWith(new EmptyVisibleLayout(), true);
-    if (indexInParent == 0) {
-      cursor->setPointedExpressionLayout(previousParent);
-      return;
-    }
-    cursor->setPointedExpressionLayout(previousParent->editableChild(indexInParent - 1));
-    cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-    return;
-  }
-  ExpressionLayout::backspaceAtCursor(cursor);
-}
-
-bool BaselineRelativeLayout::moveLeft(ExpressionLayoutCursor * cursor) {
-  assert(cursor->pointedExpressionLayout() == this);
-  // Case: Right.
-  // Go Left.
-  if (cursor->position() == ExpressionLayoutCursor::Position::Right) {
-    cursor->setPosition(ExpressionLayoutCursor::Position::Left);
-    return true;
-  }
-  // Case: Left.
-  // Ask the parent.
-  assert(cursor->position() == ExpressionLayoutCursor::Position::Left);
-  if (m_parent) {
-    return m_parent->moveLeft(cursor);
-  }
-  return false;
-}
-
-bool BaselineRelativeLayout::moveRight(ExpressionLayoutCursor * cursor) {
-  assert(cursor->pointedExpressionLayout() == this);
-  // Case: Left.
-  // Go Right.
-  if (cursor->position() == ExpressionLayoutCursor::Position::Left) {
-    cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-    return true;
-  }
-  // Case: Right.
-  // Ask the parent.
-  assert(cursor->position() == ExpressionLayoutCursor::Position::Right);
-  if (m_parent) {
-    return m_parent->moveRight(cursor);
-  }
-  return false;
-}
-
-int BaselineRelativeLayout::writeTextInBuffer(char * buffer, int bufferSize) const {
-  if (m_type == Type::Subscript) {
-    if (bufferSize == 0) {
-      return -1;
-    }
-    buffer[bufferSize-1] = 0;
-    if (bufferSize == 1) {
-      return 0;
-    }
-    int numberOfChars = LayoutEngine::writeInfixExpressionLayoutTextInBuffer(this, buffer, bufferSize, "_{");
-    if (numberOfChars < bufferSize - 1) {
-      //FIXME what if the buffer is not big enough?
-      buffer[numberOfChars++] = '}';
-      buffer[numberOfChars] = 0;
-    }
-    return numberOfChars;
-  }
-  assert(m_type == Type::Superscript);
-  return LayoutEngine::writeInfixExpressionLayoutTextInBuffer(this, buffer, bufferSize, "^");
-}
-
-ExpressionLayout * BaselineRelativeLayout::baseLayout() {
-  return editableChild(0);
-}
-
-ExpressionLayout * BaselineRelativeLayout::indiceLayout() {
-  return editableChild(1);
-}
-
-void BaselineRelativeLayout::render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) {
-  // There is nothing to draw for a subscript/superscript, only the position of the children matters
-}
-
-KDSize BaselineRelativeLayout::computeSize() {
-  KDSize baseSize = baseLayout()->size();
-  KDSize indiceSize = indiceLayout()->size();
-  return KDSize(baseSize.width() + indiceSize.width(), baseSize.height() + indiceSize.height() - k_indiceHeight);
-}
-
-void BaselineRelativeLayout::computeBaseline() {
-  m_baseline = m_type == Type::Subscript ? baseLayout()->baseline() :
-    indiceLayout()->size().height() + baseLayout()->baseline() - k_indiceHeight;
-  m_baselined = true;
-}
-
-KDPoint BaselineRelativeLayout::positionOfChild(ExpressionLayout * child) {
-  KDCoordinate x = 0;
-  KDCoordinate y = 0;
-  if (child == baseLayout() && m_type == Type::Superscript) {
-    x = 0;
-    y = indiceLayout()->size().height() - k_indiceHeight;
-  }
-  if (child == indiceLayout()) {
-    x = baseLayout()->size().width();
-    y = m_type == Type::Superscript ? 0 : baseLayout()->size().height() - k_indiceHeight;
-  }
-  return KDPoint(x,y);
-}
-
-}
-
diff --git a/poincare/src/layout/baseline_relative_layout.h b/poincare/src/layout/baseline_relative_layout.h
deleted file mode 100644
index 184f808a6..000000000
--- a/poincare/src/layout/baseline_relative_layout.h
+++ /dev/null
@@ -1,34 +0,0 @@
-#ifndef POINCARE_BASELINE_RELATIVE_LAYOUT_H
-#define POINCARE_BASELINE_RELATIVE_LAYOUT_H
-
-#include <poincare/static_layout_hierarchy.h>
-
-namespace Poincare {
-
-class BaselineRelativeLayout : public StaticLayoutHierarchy<2> {
-public:
-  enum class Type {
-    Subscript,
-    Superscript
-  };
-  BaselineRelativeLayout(ExpressionLayout * base, ExpressionLayout * indice, Type type, bool cloneOperands);
-  ExpressionLayout * clone() const override;
-  void backspaceAtCursor(ExpressionLayoutCursor * cursor) override;
-  bool moveLeft(ExpressionLayoutCursor * cursor) override;
-  bool moveRight(ExpressionLayoutCursor * cursor) override;
-  int writeTextInBuffer(char * buffer, int bufferSize) const override;
-protected:
-  ExpressionLayout * baseLayout();
-  ExpressionLayout * indiceLayout();
-  void render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) override;
-  KDSize computeSize() override;
-  void computeBaseline() override;
-  KDPoint positionOfChild(ExpressionLayout * child) override;
-  Type m_type;
-private:
-  constexpr static KDCoordinate k_indiceHeight = 5;
-};
-
-}
-
-#endif
diff --git a/poincare/src/layout/editable_baseline_relative_layout.cpp b/poincare/src/layout/editable_baseline_relative_layout.cpp
deleted file mode 100644
index 9e72033d1..000000000
--- a/poincare/src/layout/editable_baseline_relative_layout.cpp
+++ /dev/null
@@ -1,244 +0,0 @@
-#include "editable_baseline_relative_layout.h"
-#include "empty_visible_layout.h"
-#include <poincare/expression_layout_cursor.h>
-#include <string.h>
-#include <assert.h>
-
-namespace Poincare {
-
-ExpressionLayout * EditableBaselineRelativeLayout::clone() const {
-  EditableBaselineRelativeLayout * layout = new EditableBaselineRelativeLayout(const_cast<EditableBaselineRelativeLayout *>(this)->baseLayout(), const_cast<EditableBaselineRelativeLayout *>(this)->indiceLayout(), m_type, true);
-  return layout;
-}
-
-void EditableBaselineRelativeLayout::backspaceAtCursor(ExpressionLayoutCursor * cursor) {
-  if (cursor->pointedExpressionLayout() == indiceLayout()) {
-    if (m_type == Type::Superscript) {
-      assert(cursor->position() == ExpressionLayoutCursor::Position::Left);
-      ExpressionLayout * base = baseLayout();
-      ExpressionLayout * pointedLayout = base;
-      if (base->isHorizontal()) {
-        pointedLayout = base->editableChild(base->numberOfChildren()-1);
-      }
-      if (indiceLayout()->isEmpty()) {
-        if (baseLayout()->isEmpty()) {
-          // Case: Empty base and indice.
-          // Replace with an empty layout.
-          int indexInParent = m_parent->indexOfChild(this);
-          if (indexInParent == 0) {
-            pointedLayout = m_parent;
-            replaceWith(base, true);
-            cursor->setPointedExpressionLayout(pointedLayout);
-            return;
-          }
-          pointedLayout = m_parent->editableChild(indexInParent - 1);
-          cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-          replaceWith(base, true);
-          cursor->setPointedExpressionLayout(pointedLayout);
-          return;
-        }
-        // Case: Empty indice only.
-        // Replace with the base.
-        replaceWith(base, true);
-        cursor->setPointedExpressionLayout(pointedLayout);
-        cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-        return;
-      }
-      // Case: Non-empty indice.
-      // Move to the base.
-      cursor->setPointedExpressionLayout(pointedLayout);
-      cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-      return;
-    }
-    assert(m_type == Type::Subscript);
-    ExpressionLayout * previousParent = m_parent;
-    int indexInParent = previousParent->indexOfChild(this);
-    replaceWith(new EmptyVisibleLayout(), true);
-    if (indexInParent == 0) {
-      cursor->setPointedExpressionLayout(previousParent);
-      return;
-    }
-    cursor->setPointedExpressionLayout(previousParent->editableChild(indexInParent - 1));
-    cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-    return;
-  }
-  ExpressionLayout::backspaceAtCursor(cursor);
-}
-
-bool EditableBaselineRelativeLayout::moveLeft(ExpressionLayoutCursor * cursor) {
-  // Case: Left of the indice.
-  // Go from the indice to the base.
-  if (indiceLayout()
-      && cursor->pointedExpressionLayout() == indiceLayout()
-      && cursor->position() == ExpressionLayoutCursor::Position::Left)
-  {
-    assert(baseLayout() != nullptr);
-    cursor->setPointedExpressionLayout(baseLayout());
-    cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-    return true;
-  }
-  // Case: Left of the base.
-  // Ask the parent.
-  if (baseLayout()
-      && cursor->pointedExpressionLayout() == baseLayout()
-      && cursor->position() == ExpressionLayoutCursor::Position::Left)
-  {
-    cursor->setPointedExpressionLayout(this);
-    if (m_parent) {
-      return m_parent->moveLeft(cursor);
-    }
-    return false;
-  }
-  assert(cursor->pointedExpressionLayout() == this);
-  // Case: Right.
-  // Go to the indice.
-  if (cursor->position() == ExpressionLayoutCursor::Position::Right) {
-    assert(indiceLayout() != nullptr);
-    cursor->setPointedExpressionLayout(indiceLayout());
-    return true;
-  }
-  // Case: Left.
-  // Ask the parent.
-  assert(cursor->position() == ExpressionLayoutCursor::Position::Left);
-  if (m_parent) {
-    return m_parent->moveLeft(cursor);
-  }
-  return false;
-}
-
-bool EditableBaselineRelativeLayout::moveRight(ExpressionLayoutCursor * cursor) {
-  // Case: Right of the base.
-  // Go from the base to the indice.
-  if (baseLayout()
-      && cursor->pointedExpressionLayout() == baseLayout()
-      && cursor->position() == ExpressionLayoutCursor::Position::Right)
-  {
-    assert(indiceLayout() != nullptr);
-    cursor->setPointedExpressionLayout(indiceLayout());
-    cursor->setPosition(ExpressionLayoutCursor::Position::Left);
-    return true;
-  }
-  // Case: Right of the indice.
-  // Go Right.
-  if (indiceLayout()
-      && cursor->pointedExpressionLayout() == indiceLayout()
-      && cursor->position() == ExpressionLayoutCursor::Position::Right)
-  {
-    cursor->setPointedExpressionLayout(this);
-    return true;
-  }
-  assert(cursor->pointedExpressionLayout() == this);
-  // Case: Left.
-  // Go to the base and move Right.
-  if (cursor->position() == ExpressionLayoutCursor::Position::Left) {
-    assert(baseLayout() != nullptr);
-    cursor->setPointedExpressionLayout(baseLayout());
-    return baseLayout()->moveRight(cursor);
-  }
-  // Case: Right.
-  // Ask the parent.
-  assert(cursor->position() == ExpressionLayoutCursor::Position::Right);
-  cursor->setPointedExpressionLayout(this);
-  if (m_parent) {
-    return m_parent->moveRight(cursor);
-  }
-  return false;
-}
-
-bool EditableBaselineRelativeLayout::moveUp(ExpressionLayoutCursor * cursor, ExpressionLayout * previousLayout, ExpressionLayout * previousPreviousLayout) {
-  // If the baseline is a superscript:
-  if (m_type == BaselineRelativeLayout::Type::Superscript) {
-    // If the cursor is Right of the base layout, move it to the indice.
-    if (baseLayout()
-        && previousLayout == baseLayout()
-        && cursor->positionIsEquivalentTo(baseLayout(), ExpressionLayoutCursor::Position::Right))
-    {
-      assert(indiceLayout() != nullptr);
-      cursor->setPointedExpressionLayout(indiceLayout());
-      cursor->setPosition(ExpressionLayoutCursor::Position::Left);
-      cursor->setPositionInside(0);
-      return true;
-    }
-    // If the cursor is Right, move it to the indice.
-    if (cursor->positionIsEquivalentTo(this, ExpressionLayoutCursor::Position::Right)) {
-      assert(indiceLayout() != nullptr);
-      cursor->setPointedExpressionLayout(indiceLayout());
-      cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-      cursor->setPositionInside(0);
-      return true;
-    }
-  }
-  // If the baseline is a subscript:
-  if (m_type == BaselineRelativeLayout::Type::Subscript
-    && indiceLayout()
-    && previousLayout == indiceLayout())
-  {
-    // If the cursor is Left of the indice layout, move it to the base.
-    if (cursor->positionIsEquivalentTo(indiceLayout(), ExpressionLayoutCursor::Position::Left)) {
-      assert(baseLayout() != nullptr);
-      cursor->setPointedExpressionLayout(baseLayout());
-      cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-      cursor->setPositionInside(0);
-      return true;
-    }
-    // If the cursor is Right of the indice layout, move it Right.
-    if (cursor->positionIsEquivalentTo(indiceLayout(), ExpressionLayoutCursor::Position::Right)) {
-      cursor->setPointedExpressionLayout(this);
-      cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-      cursor->setPositionInside(0);
-      return true;
-    }
-  }
-  return ExpressionLayout::moveUp(cursor, previousLayout, previousPreviousLayout);
-}
-
-bool EditableBaselineRelativeLayout::moveDown(ExpressionLayoutCursor * cursor, ExpressionLayout * previousLayout, ExpressionLayout * previousPreviousLayout) {
-  // If the baseline is a subscript:
-  if (m_type == BaselineRelativeLayout::Type::Subscript) {
-    // If the cursor is Right of the base layout, move it to the indice.
-    if (baseLayout()
-        && previousLayout == baseLayout()
-        && cursor->positionIsEquivalentTo(baseLayout(), ExpressionLayoutCursor::Position::Right))
-    {
-      assert(indiceLayout() != nullptr);
-      cursor->setPointedExpressionLayout(indiceLayout());
-      cursor->setPosition(ExpressionLayoutCursor::Position::Left);
-      cursor->setPositionInside(0);
-      return true;
-    }
-    // If the cursor is Right, move it to the indice.
-    if (cursor->positionIsEquivalentTo(this, ExpressionLayoutCursor::Position::Right)) {
-      assert(indiceLayout() != nullptr);
-      cursor->setPointedExpressionLayout(indiceLayout());
-      cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-      cursor->setPositionInside(0);
-      return true;
-    }
-  }
-  // If the baseline is a superscript:
-  if (m_type == BaselineRelativeLayout::Type::Superscript
-    && indiceLayout()
-    && previousLayout == indiceLayout())
-  {
-    // If the cursor is Left of the indice layout, move it to the base.
-    if (cursor->positionIsEquivalentTo(indiceLayout(), ExpressionLayoutCursor::Position::Left)) {
-      assert(indiceLayout() != nullptr);
-      cursor->setPointedExpressionLayout(baseLayout());
-      cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-      cursor->setPositionInside(0);
-      return true;
-    }
-    // If the cursor is Right of the indice layout, move it Right.
-    if (cursor->positionIsEquivalentTo(indiceLayout(), ExpressionLayoutCursor::Position::Right)) {
-      assert(indiceLayout() != nullptr);
-      cursor->setPointedExpressionLayout(this);
-      cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-      cursor->setPositionInside(0);
-      return true;
-    }
-  }
-  return ExpressionLayout::moveDown(cursor, previousLayout, previousPreviousLayout);
-}
-
-}
-
diff --git a/poincare/src/layout/editable_baseline_relative_layout.h b/poincare/src/layout/editable_baseline_relative_layout.h
deleted file mode 100644
index af60ba3b9..000000000
--- a/poincare/src/layout/editable_baseline_relative_layout.h
+++ /dev/null
@@ -1,21 +0,0 @@
-#ifndef POINCARE_EDITABLE_BASELINE_RELATIVE_LAYOUT_H
-#define POINCARE_EDITABLE_BASELINE_RELATIVE_LAYOUT_H
-
-#include "baseline_relative_layout.h"
-
-namespace Poincare {
-
-class EditableBaselineRelativeLayout : public BaselineRelativeLayout {
-public:
-  using BaselineRelativeLayout::BaselineRelativeLayout;
-  ExpressionLayout * clone() const override;
-  void backspaceAtCursor(ExpressionLayoutCursor * cursor) override;
-  bool moveLeft(ExpressionLayoutCursor * cursor) override;
-  bool moveRight(ExpressionLayoutCursor * cursor) override;
-  bool moveUp(ExpressionLayoutCursor * cursor, ExpressionLayout * previousLayout, ExpressionLayout * previousPreviousLayout) override;
-  bool moveDown(ExpressionLayoutCursor * cursor, ExpressionLayout * previousLayout, ExpressionLayout * previousPreviousLayout) override;
-};
-
-}
-
-#endif
diff --git a/poincare/src/layout/editable_string_layout.cpp b/poincare/src/layout/editable_string_layout.cpp
deleted file mode 100644
index 951989192..000000000
--- a/poincare/src/layout/editable_string_layout.cpp
+++ /dev/null
@@ -1,122 +0,0 @@
-#include "editable_string_layout.h"
-#include <poincare/expression_layout_cursor.h>
-#include <assert.h>
-#include <stdlib.h>
-
-namespace Poincare {
-
-ExpressionLayout * EditableStringLayout::clone() const {
-  EditableStringLayout * layout = new EditableStringLayout(m_string, strlen(m_string), m_fontSize);
-  return layout;
-}
-
-bool EditableStringLayout::moveLeft(ExpressionLayoutCursor * cursor) {
-  assert(cursor->pointedExpressionLayout() == this);
-  // Case: Right.
-  // Go before the last char.
-  if (cursor->position() == ExpressionLayoutCursor::Position::Right) {
-    size_t stringLength = strlen(m_string);
-    if (stringLength > 1) {
-      cursor->setPosition(ExpressionLayoutCursor::Position::Inside);
-      cursor->setPositionInside(stringLength - 1);
-      return true;
-    }
-    if (stringLength == 1) {
-      cursor->setPosition(ExpressionLayoutCursor::Position::Left);
-      return true;
-    }
-    assert(stringLength == 0);
-    cursor->setPosition(ExpressionLayoutCursor::Position::Left);
-    if (m_parent) {
-      return m_parent->moveLeft(cursor);
-    }
-    return false;
-  }
-  // Case: Inside.
-  // Go one char left.
-  if (cursor->position() == ExpressionLayoutCursor::Position::Inside) {
-    int cursorIndex = cursor->positionInside();
-    assert(cursorIndex > 0 && cursorIndex < strlen(m_string));
-    if (cursorIndex == 1) {
-      cursor->setPosition(ExpressionLayoutCursor::Position::Left);
-      return true;
-    }
-    cursor->setPositionInside(cursorIndex - 1);
-    return true;
-  }
-  // Case: Left.
-  // Ask the parent.
-  if (m_parent) {
-    return m_parent->moveLeft(cursor);
-  }
-  return false;
-}
-
-bool EditableStringLayout::moveRight(ExpressionLayoutCursor * cursor) {
-  assert(cursor->pointedExpressionLayout() == this);
-  // Case: Left.
-  // Go after the first char.
-  if (cursor->position() == ExpressionLayoutCursor::Position::Left) {
-    size_t stringLength = strlen(m_string);
-    if (stringLength > 1) {
-      cursor->setPosition(ExpressionLayoutCursor::Position::Inside);
-      cursor->setPositionInside(1);
-      return true;
-    }
-    if (stringLength == 1) {
-      cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-      return true;
-    }
-    assert(stringLength == 0);
-    cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-    if (m_parent) {
-      return m_parent->moveRight(cursor);
-    }
-    return false;
-  }
-  // Case: Inside.
-  // Go one char right.
-  if (cursor->position() == ExpressionLayoutCursor::Position::Inside) {
-    int cursorIndex = cursor->positionInside();
-    assert(cursorIndex > 0 && cursorIndex < strlen(m_string));
-    if (cursorIndex == strlen(m_string)-1) {
-      cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-      return true;
-    }
-    cursor->setPositionInside(cursorIndex + 1);
-    return true;
-  }
-  // Case: Right.
-  // Ask the parent.
-  if (m_parent) {
-    return m_parent->moveRight(cursor);
-  }
-  return false;
-}
-
-void EditableStringLayout::moveCursorInsideAtDirection (
-    VerticalDirection direction,
-    ExpressionLayoutCursor * cursor,
-    ExpressionLayout ** childResult,
-    void * resultPosition,
-    int * resultPositionInside,
-    int * resultScore)
-{
-  ExpressionLayout::moveCursorInsideAtDirection(direction, cursor, childResult, resultPosition, resultPositionInside, resultScore);
-  ExpressionLayoutCursor::Position * castedResultPosition = static_cast<ExpressionLayoutCursor::Position *>(resultPosition);
-  // Check the distance to Inside cursors.
-  size_t stringLength = strlen(m_string);
-  int currentDistance = 0;
-  KDPoint cursorMiddleLeft = cursor->middleLeftPoint();
-  for (int i = 1; i < stringLength; i++) {
-    currentDistance = cursor->middleLeftPointOfCursor(this, ExpressionLayoutCursor::Position::Inside, i).squareDistanceTo(cursorMiddleLeft);
-    if (currentDistance < *resultScore) {
-      *childResult = this;
-      *castedResultPosition = ExpressionLayoutCursor::Position::Inside;
-      *resultPositionInside = i;
-      *resultScore = currentDistance;
-    }
-  }
-}
-
-}
diff --git a/poincare/src/layout/editable_string_layout.h b/poincare/src/layout/editable_string_layout.h
deleted file mode 100644
index 147cb1622..000000000
--- a/poincare/src/layout/editable_string_layout.h
+++ /dev/null
@@ -1,27 +0,0 @@
-#ifndef POINCARE_EDITABLE_STRING_LAYOUT_H
-#define POINCARE_EDITABLE_STRING_LAYOUT_H
-
-#include "string_layout.h"
-#include <string.h>
-
-namespace Poincare {
-
-class EditableStringLayout : public StringLayout {
-public:
-  using StringLayout::StringLayout;
-  ExpressionLayout * clone() const override;
-  bool moveLeft(ExpressionLayoutCursor * cursor) override;
-  bool moveRight(ExpressionLayoutCursor * cursor) override;
-private:
-  void moveCursorInsideAtDirection (
-    VerticalDirection direction,
-    ExpressionLayoutCursor * cursor,
-    ExpressionLayout ** childResult,
-    void * resultPosition,
-    int * resultPositionInside,
-    int * resultScore) override;
-};
-
-}
-
-#endif
diff --git a/poincare/src/layout/string_layout.cpp b/poincare/src/layout/string_layout.cpp
deleted file mode 100644
index af1ec891f..000000000
--- a/poincare/src/layout/string_layout.cpp
+++ /dev/null
@@ -1,121 +0,0 @@
-#include "string_layout.h"
-#include <poincare/expression_layout_cursor.h>
-#include <assert.h>
-#include <stdlib.h>
-
-namespace Poincare {
-
-StringLayout::StringLayout(const char * string, size_t length, KDText::FontSize fontSize) :
-  StaticLayoutHierarchy<0>(),
-  m_fontSize(fontSize)
-{
-  m_string = new char[length+1];
-  memcpy(m_string, string, length);
-  m_string[length] = 0;
-}
-
-StringLayout::~StringLayout() {
-  delete[] m_string;
-}
-
-ExpressionLayout * StringLayout::clone() const {
-  StringLayout * layout = new StringLayout(m_string, strlen(m_string), m_fontSize);
-  return layout;
-}
-
-void StringLayout::backspaceAtCursor(ExpressionLayoutCursor * cursor) {
-  assert(cursor->pointedExpressionLayout() == this);
-  if (cursor->position() == ExpressionLayoutCursor::Position::Right) {
-    cursor->setPosition(ExpressionLayoutCursor::Position::Left);
-    return;
-  }
-  assert(cursor->position() == ExpressionLayoutCursor::Position::Left);
-  m_parent->backspaceAtCursor(cursor);
-}
-
-bool StringLayout::moveLeft(ExpressionLayoutCursor * cursor) {
-  // A StringLayout is not editable, and the cursor cannot go inside it.
-  assert(cursor->pointedExpressionLayout() == this);
-  // Case: Right.
-  // If there is a Left brother, go Right of it. Else go Left of the
-  // grandparent. We need to do this to avoid adding text left or right of a
-  // string layout, for instance left of "n=" in a Sum layout.
-  if (cursor->position() == ExpressionLayoutCursor::Position::Right) {
-    int indexOfThis = m_parent->indexOfChild(this);
-    if (indexOfThis > 0) {
-      cursor->setPointedExpressionLayout(m_parent->editableChild(indexOfThis-1));
-      cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-      return true;
-    }
-    cursor->setPointedExpressionLayout(m_parent);
-    cursor->setPosition(ExpressionLayoutCursor::Position::Left);
-    return true;
-  }
-  // Case: Left.
-  // Ask the parent.
-  if (m_parent) {
-    return m_parent->moveLeft(cursor);
-  }
-  return false;
-}
-
-bool StringLayout::moveRight(ExpressionLayoutCursor * cursor) {
-  // A StringLayout is not editable, and the cursor cannot go inside it.
-  assert(cursor->pointedExpressionLayout() == this);
-  assert(m_parent != nullptr);
-  // Case: Left.
-  // If there is a Right brother, go Left of it. Else go Right of the
-  // grandparent. We need to do this to avoid adding text left or right of a
-  // string layout, for instance right of "dx" in an integral layout.
-  if (cursor->position() == ExpressionLayoutCursor::Position::Left) {
-    int indexOfThis = m_parent->indexOfChild(this);
-    if (m_parent->editableChild(indexOfThis+1) != nullptr) {
-      cursor->setPointedExpressionLayout(m_parent->editableChild(indexOfThis+1));
-      cursor->setPosition(ExpressionLayoutCursor::Position::Left);
-      return true;
-    }
-    if (m_parent->parent()) {
-      cursor->setPointedExpressionLayout(const_cast<ExpressionLayout *>(m_parent->parent()));
-      cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-      return true;
-    }
-  }
-  // Case: Right.
-  // Ask the parent.
-  return m_parent->moveRight(cursor);
-}
-
-int StringLayout::writeTextInBuffer(char * buffer, int bufferSize) const {
-  if (bufferSize == 0) {
-    return -1;
-  }
-  buffer[bufferSize-1] = 0;
-  int numberOfChar = strlcpy(buffer, m_string, bufferSize);
-  if (numberOfChar >= bufferSize-1) {
-    return bufferSize-1;
-  }
-
-  buffer[numberOfChar] = 0;
-  return numberOfChar;
-}
-
-void StringLayout::render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) {
-  ctx->drawString(m_string, p, m_fontSize, expressionColor, backgroundColor);
-}
-
-KDPoint StringLayout::positionOfChild(ExpressionLayout * child) {
-  assert(false); // We should never be here
-  return KDPointZero;
-}
-
-KDSize StringLayout::computeSize() {
-  return KDText::stringSize(m_string, m_fontSize);
-}
-
-void StringLayout::computeBaseline() {
-  // Half height of the font.
-  m_baseline = (KDText::charSize(m_fontSize).height()+1)/2;
-  m_baselined = true;
-}
-
-}
diff --git a/poincare/src/layout/string_layout.h b/poincare/src/layout/string_layout.h
deleted file mode 100644
index 8ba55f65e..000000000
--- a/poincare/src/layout/string_layout.h
+++ /dev/null
@@ -1,37 +0,0 @@
-#ifndef POINCARE_STRING_LAYOUT_H
-#define POINCARE_STRING_LAYOUT_H
-
-#include <poincare/static_layout_hierarchy.h>
-#include <poincare/layout_engine.h>
-#include <string.h>
-
-namespace Poincare {
-
-class StringLayout : public StaticLayoutHierarchy<0> {
-public:
-  StringLayout(const char * string, size_t length, KDText::FontSize fontSize = KDText::FontSize::Large);
-  ~StringLayout();
-  StringLayout(const StringLayout& other) = delete;
-  StringLayout(StringLayout&& other) = delete;
-  StringLayout& operator=(const StringLayout& other) = delete;
-  StringLayout& operator=(StringLayout&& other) = delete;
-  ExpressionLayout * clone() const override;
-  void backspaceAtCursor(ExpressionLayoutCursor * cursor) override;
-
-  char * text() { return m_string; }
-  KDText::FontSize fontSize() { return m_fontSize; }
-  bool moveLeft(ExpressionLayoutCursor * cursor) override;
-  bool moveRight(ExpressionLayoutCursor * cursor) override;
-  int writeTextInBuffer(char * buffer, int bufferSize) const override;
-protected:
-  void render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) override;
-  KDPoint positionOfChild(ExpressionLayout * child) override;
-  KDSize computeSize() override;
-  void computeBaseline() override;
-  char * m_string;
-  KDText::FontSize m_fontSize;
-};
-
-}
-
-#endif
diff --git a/poincare/src/layout/uneditable_horizontal_trio_layout.cpp b/poincare/src/layout/uneditable_horizontal_trio_layout.cpp
deleted file mode 100644
index ea8ff521d..000000000
--- a/poincare/src/layout/uneditable_horizontal_trio_layout.cpp
+++ /dev/null
@@ -1,193 +0,0 @@
-#include "uneditable_horizontal_trio_layout.h"
-#include "empty_visible_layout.h"
-#include <poincare/expression_layout_cursor.h>
-extern "C" {
-#include <assert.h>
-}
-
-namespace Poincare {
-
-UneditableHorizontalTrioLayout::UneditableHorizontalTrioLayout(ExpressionLayout * left, ExpressionLayout * central, ExpressionLayout * right, bool cloneOperands, bool cursorAllowedLeftAndRight) :
-  StaticLayoutHierarchy(left, central, right, cloneOperands),
-  m_cursorCanBeLeftOrRight(cursorAllowedLeftAndRight)
-{
-}
-
-ExpressionLayout * UneditableHorizontalTrioLayout::clone() const {
-  UneditableHorizontalTrioLayout * layout = new UneditableHorizontalTrioLayout(
-      const_cast<UneditableHorizontalTrioLayout *>(this)->leftLayout(),
-      const_cast<UneditableHorizontalTrioLayout *>(this)->centerLayout(),
-      const_cast<UneditableHorizontalTrioLayout *>(this)->rightLayout(),
-      true, m_cursorCanBeLeftOrRight);
-  return layout;
-}
-
-void UneditableHorizontalTrioLayout::backspaceAtCursor(ExpressionLayoutCursor * cursor) {
-  // Case: Left of the center layout (for sequence layouts).
-  if (cursor->pointedExpressionLayout() == centerLayout()
-      && cursor->position() == ExpressionLayoutCursor::Position::Left)
-  {
-    ExpressionLayout * grandParent = const_cast<ExpressionLayout *>(m_parent->parent());
-    assert(grandParent != nullptr);
-    ExpressionLayout * parent = m_parent;
-    int indexInGrandParent = grandParent->indexOfChild(parent);
-    parent->replaceWith(centerLayout(), true);
-    // Place the cursor on the right of the left brother of the integral if
-    // there is one.
-    if (indexInGrandParent > 0) {
-      cursor->setPointedExpressionLayout(grandParent->editableChild(indexInGrandParent - 1));
-      cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-      return;
-    }
-    // Else place the cursor on the Left of the parent.
-    cursor->setPointedExpressionLayout(grandParent);
-    return;
-  }
-  // Case: Right.
-  // Move to the argument.
-  if (cursor->pointedExpressionLayout() == this
-      && cursor->position() == ExpressionLayoutCursor::Position::Right)
-  {
-    // Go Right of the center layout's last child if it has one, else go Right
-    // of the center layout.
-    if (centerLayout()->numberOfChildren() > 1) {
-      cursor->setPointedExpressionLayout(centerLayout()->editableChild(centerLayout()->numberOfChildren()-1));
-      return;
-    }
-    cursor->setPointedExpressionLayout(centerLayout());
-    return;
-  }
-  ExpressionLayout::backspaceAtCursor(cursor);
-}
-
-bool UneditableHorizontalTrioLayout::moveLeft(ExpressionLayoutCursor * cursor) {
-  if (cursor->pointedExpressionLayout() == centerLayout()) {
-    // Case: Center layout.
-    // Go Left.
-    assert(cursor->position() == ExpressionLayoutCursor::Position::Left);
-    cursor->setPointedExpressionLayout(this);
-    if (m_cursorCanBeLeftOrRight) {
-      return true;
-    }
-    if (m_parent) {
-      return m_parent->moveLeft(cursor);
-    }
-    return false;
-  }
-  assert(cursor->pointedExpressionLayout() == this);
-  if (cursor->position() == ExpressionLayoutCursor::Position::Right) {
-    // Case: Right.
-    // Go Right of the center layout's last child if it has one, else go Right
-    // of the center layout.
-    if (centerLayout()->numberOfChildren() > 1) {
-      cursor->setPointedExpressionLayout(centerLayout()->editableChild(centerLayout()->numberOfChildren()-1));
-      return true;
-    }
-    cursor->setPointedExpressionLayout(centerLayout());
-    return true;
-  }
-  assert(cursor->position() == ExpressionLayoutCursor::Position::Left);
-  // Case: Left.
-  // Ask the parent.
-  if (m_parent) {
-    return m_parent->moveLeft(cursor);
-  }
-  return false;
-}
-
-bool UneditableHorizontalTrioLayout::moveRight(ExpressionLayoutCursor * cursor) {
-  if (cursor->pointedExpressionLayout() == centerLayout()) {
-    // Case: Center layout.
-    // Go Right.
-    assert(cursor->position() == ExpressionLayoutCursor::Position::Right);
-    cursor->setPointedExpressionLayout(this);
-    if (m_cursorCanBeLeftOrRight) {
-      return true;
-    }
-    if (m_parent) {
-      return m_parent->moveRight(cursor);
-    }
-    return false;
-  }
-  assert(cursor->pointedExpressionLayout() == this);
-  if (cursor->position() == ExpressionLayoutCursor::Position::Left) {
-    // Case: Left.
-    // Go Left of the center layout's first child if it has one, else go Left of
-    // the center layout.
-    ExpressionLayout * grandChild = centerLayout()->editableChild(0);
-    if (grandChild != nullptr) {
-      cursor->setPointedExpressionLayout(grandChild);
-      return true;
-    }
-    cursor->setPointedExpressionLayout(centerLayout());
-    return true;
-  }
-  assert(cursor->position() == ExpressionLayoutCursor::Position::Right);
-  // Case: Right.
-  // Ask the parent.
-  if (m_parent) {
-    return m_parent->moveRight(cursor);
-  }
-  return false;
-}
-
-void UneditableHorizontalTrioLayout::render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) {
-}
-
-KDSize UneditableHorizontalTrioLayout::computeSize() {
-  // TODO: This code is duplicated from horizontal_layout.cpp.
-  KDCoordinate totalWidth = 0;
-  int i = 0;
-  KDCoordinate max_under_baseline = 0;
-  KDCoordinate max_above_baseline = 0;
-  while (ExpressionLayout * c = editableChild(i++)) {
-    KDSize childSize = c->size();
-    totalWidth += childSize.width();
-    if (childSize.height() - c->baseline() > max_under_baseline) {
-      max_under_baseline = childSize.height() - c->baseline() ;
-    }
-    if (c->baseline() > max_above_baseline) {
-      max_above_baseline = c->baseline();
-    }
-  }
-  return KDSize(totalWidth, max_under_baseline + max_above_baseline);
-}
-
-void UneditableHorizontalTrioLayout::computeBaseline() {
-  // TODO: This code is duplicated from horizontal_layout.cpp.
-  m_baseline = 0;
-  for (int i = 0; i < numberOfChildren(); i++) {
-    if (editableChild(i)->baseline() > m_baseline) {
-      m_baseline = editableChild(i)->baseline();
-    }
-  }
-  m_baselined = true;
-}
-
-KDPoint UneditableHorizontalTrioLayout::positionOfChild(ExpressionLayout * child) {
-  // TODO: This code is duplicated from horizontal_layout.cpp.
-  KDCoordinate x = 0;
-  KDCoordinate y = 0;
-  int index = indexOfChild(child);
-  if (index > 0) {
-    ExpressionLayout * previousChild = editableChild(index-1);
-    assert(previousChild != nullptr);
-    x = previousChild->origin().x() + previousChild->size().width();
-  }
-  y = baseline() - child->baseline();
-  return KDPoint(x, y);
-}
-
-ExpressionLayout * UneditableHorizontalTrioLayout::leftLayout() {
-  return editableChild(0);
-}
-
-ExpressionLayout * UneditableHorizontalTrioLayout::centerLayout() {
-  return editableChild(1);
-}
-
-ExpressionLayout * UneditableHorizontalTrioLayout::rightLayout() {
-  return editableChild(2);
-}
-
-}
diff --git a/poincare/src/layout/uneditable_horizontal_trio_layout.h b/poincare/src/layout/uneditable_horizontal_trio_layout.h
deleted file mode 100644
index 484947dd5..000000000
--- a/poincare/src/layout/uneditable_horizontal_trio_layout.h
+++ /dev/null
@@ -1,48 +0,0 @@
-#ifndef POINCARE_UNEDITABLE_HORIZONTAL_TRIO_LAYOUT_H
-#define POINCARE_UNEDITABLE_HORIZONTAL_TRIO_LAYOUT_H
-
-#include <poincare/static_layout_hierarchy.h>
-#include <poincare/layout_engine.h>
-
-namespace Poincare {
-
-/*  UneditableHorizontalTrioLayout has 3 children: a left and a right layout
- *  (usually parentheses or brackets), and a central layout.
- *  The cursor can only be:
- *  - Left or Right of the UneditableHorizontalTrioLayout,
- *  - Left or Right of the central layout if it is not an horizontal layout,
- *  - Inside the central layout if it is an horizontal layout.
- * This way, the lateral children of an UneditableHorizontalTrioLayout cannot be
- * edited, and it it will always have only 3 children.
- * This layout can be used to create binomial coefficient layouts, matrix
- * layouts or the argument of sum and product layouts. */
-
-class UneditableHorizontalTrioLayout : public StaticLayoutHierarchy<3> {
-public:
-  UneditableHorizontalTrioLayout(ExpressionLayout * left, ExpressionLayout * central, ExpressionLayout * right, bool cloneOperands, bool cursorAllowedLeftAndRight);
-  ExpressionLayout * clone() const override;
-  void backspaceAtCursor(ExpressionLayoutCursor * cursor) override;
-
-  /* Navigation */
-  bool moveLeft(ExpressionLayoutCursor * cursor) override;
-  bool moveRight(ExpressionLayoutCursor * cursor) override;
-
-  /* Expression Engine */
-  int writeTextInBuffer(char * buffer, int bufferSize) const override {
-    return LayoutEngine::writeInfixExpressionLayoutTextInBuffer(this, buffer, bufferSize, "");
-  }
-protected:
-  void render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) override;
-  KDSize computeSize() override;
-  void computeBaseline() override;
-  KDPoint positionOfChild(ExpressionLayout * child) override;
-private:
-  ExpressionLayout * leftLayout();
-  ExpressionLayout * centerLayout();
-  ExpressionLayout * rightLayout();
-  bool m_cursorCanBeLeftOrRight;
-};
-
-}
-
-#endif
diff --git a/poincare/src/layout/uneditable_parenthesis_left_layout.cpp b/poincare/src/layout/uneditable_parenthesis_left_layout.cpp
deleted file mode 100644
index 5281934ee..000000000
--- a/poincare/src/layout/uneditable_parenthesis_left_layout.cpp
+++ /dev/null
@@ -1,33 +0,0 @@
-#include "uneditable_parenthesis_left_layout.h"
-#include <poincare/expression_layout_cursor.h>
-extern "C" {
-#include <assert.h>
-}
-
-namespace Poincare {
-
-ExpressionLayout * UneditableParenthesisLeftLayout::clone() const {
-  return new UneditableParenthesisLeftLayout();
-}
-
-bool UneditableParenthesisLeftLayout::moveLeft(ExpressionLayoutCursor * cursor) {
-  assert(cursor->pointedExpressionLayout() == this);
-  // Ask the parent.
-  if (m_parent) {
-    cursor->setPosition(ExpressionLayoutCursor::Position::Left);
-    return m_parent->moveLeft(cursor);
-  }
-  return false;
-}
-
-bool UneditableParenthesisLeftLayout::moveRight(ExpressionLayoutCursor * cursor) {
-  assert(cursor->pointedExpressionLayout() == this);
-  // Ask the parent.
-  if (m_parent) {
-    cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-    return m_parent->moveRight(cursor);
-  }
-  return false;
-}
-
-}
diff --git a/poincare/src/layout/uneditable_parenthesis_left_layout.h b/poincare/src/layout/uneditable_parenthesis_left_layout.h
deleted file mode 100644
index b3b693330..000000000
--- a/poincare/src/layout/uneditable_parenthesis_left_layout.h
+++ /dev/null
@@ -1,18 +0,0 @@
-#ifndef POINCARE_UNEDITABLE_PARENTHESIS_LEFT_LAYOUT_H
-#define POINCARE_UNEDITABLE_PARENTHESIS_LEFT_LAYOUT_H
-
-#include <poincare/src/layout/parenthesis_left_layout.h>
-
-namespace Poincare {
-
-class UneditableParenthesisLeftLayout : public ParenthesisLeftLayout {
-public:
-  using ParenthesisLeftLayout::ParenthesisLeftLayout;
-  ExpressionLayout * clone() const override;
-  bool moveLeft(ExpressionLayoutCursor * cursor) override;
-  bool moveRight(ExpressionLayoutCursor * cursor) override;
-};
-
-}
-
-#endif
diff --git a/poincare/src/layout/uneditable_parenthesis_right_layout.cpp b/poincare/src/layout/uneditable_parenthesis_right_layout.cpp
deleted file mode 100644
index bba558231..000000000
--- a/poincare/src/layout/uneditable_parenthesis_right_layout.cpp
+++ /dev/null
@@ -1,33 +0,0 @@
-#include "uneditable_parenthesis_right_layout.h"
-#include <poincare/expression_layout_cursor.h>
-extern "C" {
-#include <assert.h>
-}
-
-namespace Poincare {
-
-ExpressionLayout * UneditableParenthesisRightLayout::clone() const {
-  return new UneditableParenthesisRightLayout();
-}
-
-bool UneditableParenthesisRightLayout::moveLeft(ExpressionLayoutCursor * cursor) {
-  assert(cursor->pointedExpressionLayout() == this);
-  // Ask the parent.
-  if (m_parent) {
-    cursor->setPosition(ExpressionLayoutCursor::Position::Left);
-    return m_parent->moveLeft(cursor);
-  }
-  return false;
-}
-
-bool UneditableParenthesisRightLayout::moveRight(ExpressionLayoutCursor * cursor) {
-  assert(cursor->pointedExpressionLayout() == this);
-  // Ask the parent.
-  if (m_parent) {
-    cursor->setPosition(ExpressionLayoutCursor::Position::Right);
-    return m_parent->moveRight(cursor);
-  }
-  return false;
-}
-
-}
diff --git a/poincare/src/layout/uneditable_parenthesis_right_layout.h b/poincare/src/layout/uneditable_parenthesis_right_layout.h
deleted file mode 100644
index 2025f4a25..000000000
--- a/poincare/src/layout/uneditable_parenthesis_right_layout.h
+++ /dev/null
@@ -1,18 +0,0 @@
-#ifndef POINCARE_UNEDITABLE_PARENTHESIS_RIGHT_LAYOUT_H
-#define POINCARE_UNEDITABLE_PARENTHESIS_RIGHT_LAYOUT_H
-
-#include <poincare/src/layout/parenthesis_right_layout.h>
-
-namespace Poincare {
-
-class UneditableParenthesisRightLayout : public ParenthesisRightLayout {
-public:
-  using ParenthesisRightLayout::ParenthesisRightLayout;
-  ExpressionLayout * clone() const override;
-  bool moveLeft(ExpressionLayoutCursor * cursor) override;
-  bool moveRight(ExpressionLayoutCursor * cursor) override;
-};
-
-}
-
-#endif