Update cheatsheet.fr.md

12.temporary_ins/07.geometry-coordinates-prop2/40.n4/20.overview/cheatsheet.fr.md

@@ -1021,7 +1021,7 @@ _{\color{blue}{\begin{array}{c}\text{a, b et c muets} \,\Longrightarrow \\ \text
 \\
 &=\dfrac{dv^a}{d\lambda}\,\mathbf{e_a}+\Gamma_{bc}^{\;a}\,\dfrac{dx^b}{d\lambda}\,v^c\,\mathbf{e_a}\\
 \\
-&=\letf(\dfrac{dv^a}{d\lambda}\,+\,\Gamma_{bc}^{\;a}\,\dfrac{dx^b}{d\lambda}\,v^c\right)\,\mathbf{e_a}
+&=\left(\dfrac{dv^a}{d\lambda}\,+\,\Gamma_{bc}^{\;a}\,\dfrac{dx^b}{d\lambda}\,v^c\right)\,\mathbf{e_a}
 \end{align}`$