diff --git a/01.curriculum/01.physics-chemistry-biology/03.Niv3/05.math-tools-for-physics/04.differential-operators/04.curl/textbook.fr.md b/01.curriculum/01.physics-chemistry-biology/03.Niv3/05.math-tools-for-physics/04.differential-operators/04.curl/textbook.fr.md
index 3301a1cd4..69db8af59 100644
--- a/01.curriculum/01.physics-chemistry-biology/03.Niv3/05.math-tools-for-physics/04.differential-operators/04.curl/textbook.fr.md
+++ b/01.curriculum/01.physics-chemistry-biology/03.Niv3/05.math-tools-for-physics/04.differential-operators/04.curl/textbook.fr.md
@@ -184,11 +184,11 @@ La même démarche appliquée à la branche opposée CD de centre R me donne
 
 $`\overrightarrow{dl_{AB}}=+dy \cdot \overrightarrow{e_y}`$
 
-$`\displaystyle \overrightarrow{X_R}=
-\left[X_M+\left.\dfrac{\partial X}{\partial x}\right|_M \cdot 
+$`\displaystyle \overrightarrow{X_R}=\left[X_M + 
+\left.\dfrac{\partial X}{\partial x}\right|_M \cdot 
 \left(+\dfrac{dx}{2}\right)\right] \cdot \overrightarrow{e_x}`$
 $`+\left[Y_M+\left.\dfrac{\partial Y}{\partial x}\right|_M \cdot 
-\left(+\dfrac{dx}{2}\right)\right] \cdot \overrightarrow{e_y}$``
+\left(+\dfrac{dx}{2}\right)\right] \cdot \overrightarrow{e_y}$`
 $`+\left[Z_M+\left.\dfrac{\partial Z}{\partial x}\right|_M \cdot 
 \left(+\dfrac{dx}{2}\right)\right] \cdot \overrightarrow{e_z}`$