diff --git a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/10.main/textbook.fr.md b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/10.main/textbook.fr.md
index 57ec9d440..ad3173061 100644
--- a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/10.main/textbook.fr.md
+++ b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/10.main/textbook.fr.md
@@ -206,8 +206,15 @@ Partícula :
 
 
 <br>
+
+$`\overrightarrow{L}=\begin{vmatrix}
+\widehat{i} & \widehat{j} & \widehat{k}\\
+x & y & z\\
+p_x & p_y & p_z\end{vmatrix}`$
+
+
 $`\overrightarrow{L}=\begin{vmatrix}
-\hat{i}&\hat{j}&\hat{k}\\
+\hat{i} & \hat{j} & \hat{k}\\
 x & y & z\\
 p_x & p_y & p_z\end{vmatrix}`$