diff --git a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/05.classical-mechanics/vector-analysis/textbook.fr.md b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/05.classical-mechanics/vector-analysis/textbook.fr.md
index 327cd3864..9847647bd 100644
--- a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/05.classical-mechanics/vector-analysis/textbook.fr.md
+++ b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/05.classical-mechanics/vector-analysis/textbook.fr.md
@@ -717,8 +717,8 @@ $`=\dfrac{\overrightarrow{OM}(t+dt)-\overrightarrow{OM}(t)}{dt}`$<br>
 +d\left(B(t)\cdot\overrightarrow{e_y}\right)`$
 $`=d\left(A(t)\right)\cdot\overrightarrow{e_x}
 +d\left(B(t)\right)\cdot\overrightarrow{e_y}`$
-$`+A(t)\cdot d\overrightarrow{e_x} + B(t)\cdot d\overrightarrow{e_y}`$<br>
-<br>
+$`+A(t)\cdot d\overrightarrow{e_x} + B(t)\cdot d\overrightarrow{e_y}`$
+
 $`d\overrightarrow{OM}(t)=d\left[A(t)\cdot\overrightarrow{e_x}+B(t)\cdot\overrightarrow{e_y}\right]`$
 $`=d\left[A(t)\cdot\overrightarrow{e_x}\right]+d\left[B(t)\cdot\overrightarrow{e_y}\right]`$
 $`=dA(t)\cdot\overrightarrow{e_x}+A(t)\cdot d\overrightarrow{e_x}