diff --git a/apps/regression/regression_context.cpp b/apps/regression/regression_context.cpp
index 6499e64fc..b1faf2eee 100644
--- a/apps/regression/regression_context.cpp
+++ b/apps/regression/regression_context.cpp
@@ -1,5 +1,4 @@
 #include "regression_context.h"
-#include <poincare/decimal.h>
 #include <assert.h>
 #include <string.h>
 
@@ -21,10 +20,8 @@ const Expression * RegressionContext::expressionForSymbol(const Symbol * symbol)
 
     assert(m_seriesPairIndex >= 0);
     assert(m_seriesPairIndex < m_store->numberOfPairsOfSeries(series));
-
-    Expression * result = new Decimal(m_store->get(series, storeI, m_seriesPairIndex));
-    assert(result != nullptr);
-    return result;
+    m_value = Complex<double>::Float(m_store->get(series, storeI, m_seriesPairIndex));
+    return &m_value;
   } else {
     return m_parentContext->expressionForSymbol(symbol);
   }
diff --git a/apps/shared/store_context.h b/apps/shared/store_context.h
index 7b0513fb7..7284a84a5 100644
--- a/apps/shared/store_context.h
+++ b/apps/shared/store_context.h
@@ -2,7 +2,9 @@
 #define SHARED_STORE_CONTEXT_H
 
 #include <poincare/context.h>
+#include <poincare/complex.h>
 #include "double_pair_store.h"
+#include <cmath>
 
 namespace Shared {
 
@@ -12,7 +14,8 @@ public:
     Poincare::Context(),
     m_store(store),
     m_seriesPairIndex(-1),
-    m_parentContext(nullptr)
+    m_parentContext(nullptr),
+    m_value(Poincare::Complex<double>::Float(NAN))
   {}
   void setParentContext(Poincare::Context * parentContext) { m_parentContext = parentContext; }
   void setSeriesPairIndex(int j) { m_seriesPairIndex = j; }
@@ -21,6 +24,7 @@ protected:
   Shared::DoublePairStore * m_store;
   int m_seriesPairIndex;
   Poincare::Context * m_parentContext;
+  Poincare::Complex<double> m_value;
 };
 
 }
diff --git a/apps/statistics/statistics_context.cpp b/apps/statistics/statistics_context.cpp
index 301345d7c..5cb4ee356 100644
--- a/apps/statistics/statistics_context.cpp
+++ b/apps/statistics/statistics_context.cpp
@@ -1,5 +1,4 @@
 #include "statistics_context.h"
-#include <poincare/decimal.h>
 #include <assert.h>
 #include <string.h>
 
@@ -21,10 +20,8 @@ const Expression * StatisticsContext::expressionForSymbol(const Symbol * symbol)
 
     assert(m_seriesPairIndex >= 0);
     assert(m_seriesPairIndex < m_store->numberOfPairsOfSeries(series));
-
-    Expression * result = new Decimal(m_store->get(series, storeI, m_seriesPairIndex));
-    assert(result != nullptr);
-    return result;
+    m_value = Complex<double>::Float(m_store->get(series, storeI, m_seriesPairIndex));
+    return &m_value;
   } else {
     return m_parentContext->expressionForSymbol(symbol);
   }