LaTeX Forum

\documentclass{scrreprt}

\usepackage[T1]{fontenc}
\usepackage[ansinew]{inputenc}
\usepackage[ngerman]{babel}

\usepackage{mathtools}
\usepackage{amssymb}
\usepackage{physics}
\usepackage{esint}
\usepackage[charter]{mathdesign}

\begin{document}

\begin{equation}
	\pdv{t} \oiiint_V  \rho \dd{V} + \oiint_S \rho\nu \cdot n \dd{S}
\end{equation}

\end{document}

\documentclass[a4paper,12pt,headsepline,bibliography=totoc,listof=totoc,numbers=noenddot]{scrreprt}

\usepackage[T1]{fontenc}
\usepackage[ansinew]{inputenc}
\usepackage[ngerman]{babel}

\usepackage{amsmath}  				
\usepackage{amssymb}
\usepackage{esdiff}	

\begin{document}

\begin{equation}
%Hier soll die Formel stehen%
\end{equation}

\end{document}