Update cheatsheet.fr.md

12.temporary_ins/80.energie-transformations-applications-impacts/20.n2/50.energy-mix/40.TD-hydroelectricity/50.parallel-1/cheatsheet.fr.md

@@ -88,8 +88,7 @@ $`\hspace{1,1cm}=\dfrac{6\times 3\times 1}{2}\times 10^{3+3+2}`$
 **$`\boldsymbol{\mathbf{E_{\,stock}^{\,grav}=
 \varrho_{eau}\times\dfrac{L\times l \times h}{2}\times g \times H}}`$**
 
-$`=10^3\times\dfrac{6\times 3 &\times 1 \times 10^{3+3+2}}{2}\\
-&\times 10^1 \times 1,5\cdot10^2`$  
+$`=10^3\times\dfrac{6\times 3 &\times 1 \times 10^{3+3+2}}{2}\times 10^1 \times 1,5\cdot10^2`$  
 
 *$`\mathbf{= 13,5\times 10^{14}\,J}`$*