deletions | additions       diff --git a/begin_equation_frac_mathscr_d__.tex b/begin_equation_frac_mathscr_d__.tex  index cbb43ff..f707824 100644  --- a/begin_equation_frac_mathscr_d__.tex  +++ b/begin_equation_frac_mathscr_d__.tex 
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\begin{equation*}  \frac{\mathscr{d}}{\mathscr{d}\mathcal{A}}\int_\mathcal{G} \frac{\mathscr{d}}{\mathscr{dA}}\int_\mathcal{G}  \rho dV \mathscr{dV}  = - \int_{\partial \mathcal{G}}\mathscr{f} \cdot \mathscr{n} \,\mathscr{dS}\nonumber \end{equation*}