diff --git a/apps/shared/expression_model.h b/apps/shared/expression_model.h
index 8482e9f04..d511abe03 100644
--- a/apps/shared/expression_model.h
+++ b/apps/shared/expression_model.h
@@ -20,6 +20,9 @@ public:
   Poincare::ExpressionLayout * layout();
   virtual bool isDefined();
   virtual bool isEmpty();
+  virtual bool shouldBeClearedBeforeRemove() {
+    return !isEmpty();
+  }
   virtual void setContent(const char * c);
   virtual void tidy();
 private:
diff --git a/apps/shared/expression_model_list_controller.cpp b/apps/shared/expression_model_list_controller.cpp
index b720aca9e..cb09deb82 100644
--- a/apps/shared/expression_model_list_controller.cpp
+++ b/apps/shared/expression_model_list_controller.cpp
@@ -70,7 +70,7 @@ bool ExpressionModelListController::handleEventOnExpression(Ion::Events::Event e
   }
   if (event == Ion::Events::Backspace && !isAddEmptyRow(selectedRow())) {
     ExpressionModel * model = modelStore()->modelAtIndex(modelIndexForRow(selectedRow()));
-    if (!model->isEmpty()) {
+    if (model->shouldBeClearedBeforeRemove()) {
       reinitExpression(model);
     } else {
       if (removeModelRow(model)) {
diff --git a/apps/solver/equation.h b/apps/solver/equation.h
index e615454cc..3fa925cb0 100644
--- a/apps/solver/equation.h
+++ b/apps/solver/equation.h
@@ -15,6 +15,9 @@ public:
   Equation(Equation&& other) = delete;
   void setContent(const char * c) override;
   void tidy() override;
+  bool shouldBeClearedBeforeRemove() override {
+    return false;
+  }
   Poincare::Expression * standardForm(Poincare::Context * context) const;
 private:
   mutable Poincare::Expression * m_standardForm;