Update cheatsheet.fr.md

12.temporary_ins/32.sets-systems/30.n3/20.systems/20.overview/cheatsheet.fr.md

@@ -100,8 +100,8 @@ RÉSUMÉ<br>
 
    $`\Large{\left.\dfrac{dN}{dt}\right\lvert_{\,\bigt} = r\,N(t)}\normalsize{\quad \Longrightarrow\quad\left.\dfrac{dN}{N}\right\lvert_{\,\bigt}=r\,dt}`$
 
-  $`\normalsize{\displaystyle\begin{align}
-  \;\; &\Longrightarrow\;\int_{N(t_1)}^{N(t_2)}\dfrac{dN}{N}=\int_{t_1}^{t_2} r\,dt\\
+  $`\displaystyle\begin{align}
+  \normalsize{\;\; &\Longrightarrow\;\int_{N(t_1)}^{N(t_2)}\dfrac{dN}{N}=\int_{t_1}^{t_2} r\,dt\\
    \\
    &\Longrightarrow\;\big[\,ln\,|N|\,\big]_{N(t_1)}^{N(t_2)}= r \,\big[\,t\,\big]_{t_1}^{t_2}\\
    \\