Update cheatsheet.fr.md

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

@@ -76,7 +76,7 @@ RÉSUMÉ<br>
 
   <br>
   $`\displaystyle\begin{align}
-   \Large{\left.\dfrac{dN}{dt}\right\lvert_{\,\bigt} = &r\,N(t)}\quad \Longrightarrow\quad\left.\dfrac{dN}{N}\right\lvert_{\,\bigt}=r\,dt\\
+   \Large{\left.\dfrac{dN}{dt}\right\lvert_{\,\bigt} = r\,N(t)}&\quad \Longrightarrow\quad\left.\dfrac{dN}{N}\right\lvert_{\,\bigt}=r\,dt\\
    \\
   &\Longrightarrow\quad\int_{N(t_1)}^{N(t_2)}\dfrac{dN}{N}=\int_{t_1}^{t_2} r\,dt\\
    \\