\documentclass{scrartcl}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage{graphicx}
\usepackage[applemac]{inputenc}
\usepackage{ngerman}
\usepackage{german, fancyheadings, dsfont, graphicx, color}
\usepackage{amsmath, amssymb, amsfonts, amsthm}
\usepackage{hyperref}
\title{}
\author{Cong Lan}
\date{\today}
\begin{document}
\maketitle
\tableofcontents
\newpage
\section{Zetafunktion}
\[\zeta(s)=\sum_{n=0}^{\infty}\frac{1}{n^s}\]
\end{document}
