diff --git a/apps/graph/graph/integral_graph_controller.cpp b/apps/graph/graph/integral_graph_controller.cpp
index 3c781c31d..c5b039d7b 100644
--- a/apps/graph/graph/integral_graph_controller.cpp
+++ b/apps/graph/graph/integral_graph_controller.cpp
@@ -1,5 +1,6 @@
 #include "integral_graph_controller.h"
 #include "../../shared/text_field_delegate.h"
+#include <poincare/integral.h>
 #include <poincare/layout_helper.h>
 #include "../app.h"
 
@@ -46,4 +47,11 @@ Layout IntegralGraphController::createFunctionLayout(ExpiringPointer<Shared::Fun
   return LayoutHelper::String(buffer, strlen(buffer), KDFont::SmallFont);
 }
 
+Poincare::Expression IntegralGraphController::sumBetweenBounds(Shared::ExpiringPointer<Shared::Function> function, double start, double end, Poincare::Context * context) const {
+  return Poincare::Integral::Builder(function->expressionReduced(context).clone(), Poincare::Symbol::Builder(UCodePointUnknownX), Poincare::Float<double>::Builder(start), Poincare::Float<double>::Builder(end)); // Integral takes ownership of args
+  /* TODO: when we approximate integral, we might want to simplify the integral
+   * here. However, we might want to do it once for all x (to avoid lagging in
+   * the derivative table. */
+}
+
 }
diff --git a/apps/graph/graph/integral_graph_controller.h b/apps/graph/graph/integral_graph_controller.h
index 6243127d7..7e7257a59 100644
--- a/apps/graph/graph/integral_graph_controller.h
+++ b/apps/graph/graph/integral_graph_controller.h
@@ -15,6 +15,7 @@ private:
   I18n::Message legendMessageAtStep(Step step) override;
   double cursorNextStep(double position, int direction) override;
   Poincare::Layout createFunctionLayout(Shared::ExpiringPointer<Shared::Function> function) override;
+  Poincare::Expression sumBetweenBounds(Shared::ExpiringPointer<Shared::Function> function, double start, double end, Poincare::Context * context) const override;
 };
 
 }
diff --git a/apps/sequence/graph/term_sum_controller.cpp b/apps/sequence/graph/term_sum_controller.cpp
index 71cad17bb..6446926ee 100644
--- a/apps/sequence/graph/term_sum_controller.cpp
+++ b/apps/sequence/graph/term_sum_controller.cpp
@@ -1,5 +1,6 @@
 #include "term_sum_controller.h"
 #include "../../shared/text_field_delegate.h"
+#include <poincare/sum.h>
 #include <poincare/code_point_layout.h>
 #include <poincare/horizontal_layout.h>
 #include <poincare/vertical_offset_layout.h>
@@ -53,4 +54,8 @@ Layout TermSumController::createFunctionLayout(Shared::ExpiringPointer<Shared::F
   return sequence->nameLayout();
 }
 
+Poincare::Expression TermSumController::sumBetweenBounds(Shared::ExpiringPointer<Shared::Function> function, double start, double end, Poincare::Context * context) const {
+  return Poincare::Sum::Builder(function->expressionReduced(context).clone(), Poincare::Symbol::Builder(UCodePointUnknownX), Poincare::Float<double>::Builder(start), Poincare::Float<double>::Builder(end)); // Sum takes ownership of args
+}
+
 }
diff --git a/apps/sequence/graph/term_sum_controller.h b/apps/sequence/graph/term_sum_controller.h
index 092c3377c..5c58a602c 100644
--- a/apps/sequence/graph/term_sum_controller.h
+++ b/apps/sequence/graph/term_sum_controller.h
@@ -18,6 +18,7 @@ private:
   I18n::Message legendMessageAtStep(Step step) override;
   double cursorNextStep(double position, int direction) override;
   Poincare::Layout createFunctionLayout(Shared::ExpiringPointer<Shared::Function> function) override;
+  Poincare::Expression sumBetweenBounds(Shared::ExpiringPointer<Shared::Function> function, double start, double end, Poincare::Context * context) const override;
 };
 
 }
diff --git a/apps/sequence/sequence.cpp b/apps/sequence/sequence.cpp
index 296d0e0dc..fb59b8ca9 100644
--- a/apps/sequence/sequence.cpp
+++ b/apps/sequence/sequence.cpp
@@ -6,7 +6,6 @@
 #include <poincare/code_point_layout.h>
 #include <poincare/vertical_offset_layout.h>
 #include <poincare/integer.h>
-#include <poincare/sum.h>
 #include "../shared/poincare_helpers.h"
 #include <string.h>
 #include <cmath>
@@ -186,11 +185,6 @@ T Sequence::approximateToNextRank(int n, SequenceContext * sqctx) const {
   }
 }
 
-double Sequence::sumBetweenBounds(double start, double end, Context * context) const {
-  Poincare::Sum sum = Poincare::Sum::Builder(expressionReduced(context).clone(), Symbol::Builder(UCodePointUnknownX), Poincare::Float<double>::Builder(start), Poincare::Float<double>::Builder(end)); // Sum takes ownership of args
-  return PoincareHelpers::ApproximateToScalar<double>(sum, *context);
-}
-
 Sequence::SequenceRecordDataBuffer * Sequence::recordData() const {
   assert(!isNull());
   Ion::Storage::Record::Data d = value();
diff --git a/apps/sequence/sequence.h b/apps/sequence/sequence.h
index 794d4bdd6..a3393fe8b 100644
--- a/apps/sequence/sequence.h
+++ b/apps/sequence/sequence.h
@@ -64,8 +64,6 @@ public:
     return templatedApproximateAtAbscissa(x, static_cast<SequenceContext *>(context));
   }
   template<typename T> T approximateToNextRank(int n, SequenceContext * sqctx) const;
-  // Integral
-  double sumBetweenBounds(double start, double end, Poincare::Context * context) const override;
 
   constexpr static int k_initialRankNumberOfDigits = 3; // m_initialRank is capped by 999
 private:
diff --git a/apps/shared/cartesian_function.cpp b/apps/shared/cartesian_function.cpp
index 8e27cdb9e..823b5e8cc 100644
--- a/apps/shared/cartesian_function.cpp
+++ b/apps/shared/cartesian_function.cpp
@@ -2,7 +2,6 @@
 #include "expression_model_store.h"
 #include "poincare_helpers.h"
 #include <poincare/derivative.h>
-#include <poincare/integral.h>
 #include <poincare/serialization_helper.h>
 #include <escher/palette.h>
 #include <ion/unicode/utf8_decoder.h>
@@ -95,15 +94,6 @@ double CartesianFunction::approximateDerivative(double x, Poincare::Context * co
   return PoincareHelpers::ApproximateToScalar<double>(derivative, context);
 }
 
-double CartesianFunction::sumBetweenBounds(double start, double end, Poincare::Context * context) const {
-  // TODO: this does not work yet because integral does not understand UnknownX
-  Poincare::Integral integral = Poincare::Integral::Builder(expressionReduced(context).clone(), Symbol::Builder(UCodePointUnknownX), Poincare::Float<double>::Builder(start), Poincare::Float<double>::Builder(end)); // Integral takes ownership of args
-  /* TODO: when we approximate integral, we might want to simplify the integral
-   * here. However, we might want to do it once for all x (to avoid lagging in
-   * the derivative table. */
-  return PoincareHelpers::ApproximateToScalar<double>(integral, context);
-}
-
 void * CartesianFunction::Model::expressionAddress(const Ion::Storage::Record * record) const {
   return (char *)record->value().buffer+sizeof(CartesianFunctionRecordDataBuffer);
 }
diff --git a/apps/shared/cartesian_function.h b/apps/shared/cartesian_function.h
index d45d54f64..2ccea10d5 100644
--- a/apps/shared/cartesian_function.h
+++ b/apps/shared/cartesian_function.h
@@ -28,8 +28,6 @@ public:
   void setDisplayDerivative(bool display);
   int derivativeNameWithArgument(char * buffer, size_t bufferSize);
   double approximateDerivative(double x, Poincare::Context * context) const;
-  // Integral
-  double sumBetweenBounds(double start, double end, Poincare::Context * context) const override;
 private:
   /* CartesianFunctionRecordDataBuffer is the layout of the data buffer of Record
    * representing a CartesianFunction. See comment on
diff --git a/apps/shared/function.h b/apps/shared/function.h
index 207a35796..9baca7094 100644
--- a/apps/shared/function.h
+++ b/apps/shared/function.h
@@ -38,7 +38,6 @@ public:
   // Evaluation
   virtual float evaluateAtAbscissa(float x, Poincare::Context * context) const = 0;
   virtual double evaluateAtAbscissa(double x, Poincare::Context * context) const = 0;
-  virtual double sumBetweenBounds(double start, double end, Poincare::Context * context) const = 0;
 protected:
   /* FunctionRecordDataBuffer is the layout of the data buffer of Record
    * representing a Function. We want to avoid padding which would:
diff --git a/apps/shared/sum_graph_controller.cpp b/apps/shared/sum_graph_controller.cpp
index 6400e16d0..01b34e940 100644
--- a/apps/shared/sum_graph_controller.cpp
+++ b/apps/shared/sum_graph_controller.cpp
@@ -135,7 +135,9 @@ void SumGraphController::reloadBannerView() {
     FunctionApp * myApp = FunctionApp::app();
     assert(!m_record.isNull());
     ExpiringPointer<Function> function = myApp->functionStore()->modelForRecord(m_record);
-    result = function->sumBetweenBounds(m_startSum, endSum, myApp->localContext());
+    Poincare::Context * context = myApp->localContext();
+    Poincare::Expression sum = sumBetweenBounds(function, m_startSum, endSum, context);
+    result = PoincareHelpers::ApproximateToScalar<double>(sum, context);
     functionLayout = createFunctionLayout(function);
   } else {
     m_legendView.setEditableZone(m_cursor->x());
diff --git a/apps/shared/sum_graph_controller.h b/apps/shared/sum_graph_controller.h
index 6a7ba1b86..4da12363a 100644
--- a/apps/shared/sum_graph_controller.h
+++ b/apps/shared/sum_graph_controller.h
@@ -42,6 +42,7 @@ private:
   virtual I18n::Message legendMessageAtStep(Step step) = 0;
   virtual double cursorNextStep(double position, int direction) = 0;
   virtual Poincare::Layout createFunctionLayout(ExpiringPointer<Function> function) = 0;
+  virtual Poincare::Expression sumBetweenBounds(ExpiringPointer<Function> function, double start, double end, Poincare::Context * context) const = 0;
   class LegendView : public View {
   public:
     LegendView(SumGraphController * controller, InputEventHandlerDelegate * inputEventHandlerDelegate, CodePoint sumSymbol);