diff --git a/2nd/01_Fraction_Developpement_Litteral/6E_bilan_dev_red.pdf b/2nd/01_Fraction_Developpement_Litteral/6E_bilan_dev_red.pdf
index c253f24..538883e 100644
Binary files a/2nd/01_Fraction_Developpement_Litteral/6E_bilan_dev_red.pdf and b/2nd/01_Fraction_Developpement_Litteral/6E_bilan_dev_red.pdf differ
diff --git a/2nd/01_Fraction_Developpement_Litteral/6E_bilan_dev_red.tex b/2nd/01_Fraction_Developpement_Litteral/6E_bilan_dev_red.tex
index 5dcb6ef..52e096a 100644
--- a/2nd/01_Fraction_Developpement_Litteral/6E_bilan_dev_red.tex
+++ b/2nd/01_Fraction_Developpement_Litteral/6E_bilan_dev_red.tex
@@ -30,7 +30,7 @@
 \end{exercise}
 
 \begin{solution}
-    \begin{multicols}{2}
+    \begin{multicols}{3}
         \begin{flalign*}
             A =& - 3x - 10 + 4x + 7\\ =& - 3x - 10 + 4x + 7\\ =& - 3x + 4x - 10 + 7\\ =& (- 3 + 4) \times x - 3\\ =& x - 3
         \end{flalign*}
@@ -67,7 +67,7 @@
 \end{exercise}
 
 \begin{solution}
-    \begin{multicols}{2}
+    \begin{multicols}{3}
         \begin{flalign*}
             A =& 10(x + 3)\\ =& 10x + 10 \times 3\\ =& 10x + 30
         \end{flalign*}
@@ -104,7 +104,7 @@
 \end{exercise}
 
 \begin{solution}
-    \begin{multicols}{2}
+    \begin{multicols}{3}
         \begin{flalign*}
             A =& 10(x + 3)\\ =& 10x + 10 \times 3\\ =& 10x + 30
         \end{flalign*}
diff --git a/2nd/01_Fraction_Developpement_Litteral/tpl_6E_bilan_dev_red.tex b/2nd/01_Fraction_Developpement_Litteral/tpl_6E_bilan_dev_red.tex
index 74b2c00..1e81d22 100644
--- a/2nd/01_Fraction_Developpement_Litteral/tpl_6E_bilan_dev_red.tex
+++ b/2nd/01_Fraction_Developpement_Litteral/tpl_6E_bilan_dev_red.tex
@@ -35,7 +35,7 @@
 \end{exercise}
 
 \begin{solution}
-    \begin{multicols}{2}
+    \begin{multicols}{3}
         \begin{flalign*}
             A =& \Var{a.simplify().explain() | join('\\\ =& ')}
         \end{flalign*}
@@ -79,7 +79,7 @@
 \end{exercise}
 
 \begin{solution}
-    \begin{multicols}{2}
+    \begin{multicols}{3}
         \begin{flalign*}
             A =& \Var{a.simplify().explain() | join('\\\ =& ')}
         \end{flalign*}
@@ -122,6 +122,7 @@
     \end{multicols}
 \end{exercise}
 
+\printcollection{exercise}
 
 \newpage