Update cheatsheet.fr.md

12.temporary_ins/08.conservative-vector-fields/20.conservative-vector-fields-properties/20.overview/cheatsheet.fr.md

@@ -403,9 +403,9 @@ $`d\phi=\big(X_{\alpha}\;\overrightarrow{e_{\alpha}}+X_{\beta}\;\overrightarrow{
 \cdot\big(dl_{\alpha}\;\overrightarrow{e_{\alpha}}+dl_{\beta}\;\overrightarrow{e_{\beta}}+dl_{\gamma}\;\overrightarrow{e_{\gamma}}\big)`$
 
 $`\begin{align}{l}
-\quad& = X_{\beta}\,dl_{\alpha}\,\big(\overrightarrow{e_{\alpha}}\cdot\overrightarrow{e_{\alpha}}\big)
-+X_{\beta}\,dl_{\beta}\,\big(\overrightarrow{e_{\alpha}}\cdot\overrightarrow{e_{\beta}\big)
-+X_{\beta}\,dl_{\gamma}\,\big(\overrightarrow{e_{\alpha}}\cdot\overrightarrow{e_{\bgamma}\big)\\
+\quad & = X_{\alpha}\,dl_{\alpha}\,\big(\overrightarrow{e_{\alpha}}\cdot\overrightarrow{e_{\alpha}}\big)
++X_{\alpha}\,dl_{\beta}\,\big(\overrightarrow{e_{\alpha}}\cdot\overrightarrow{e_{\beta}}\big)
++X_{\alpha}\,dl_{\gamma}\,\big(\overrightarrow{e_{\alpha}}\cdot\overrightarrow{e_{\gamma}}\big)\\
 \end{align}`$