\documentclass[10pt,landscape,a4paper]{article}

\usepackage[utf8]{inputenc}
\usepackage[ngerman]{babel}
\usepackage[nosf]{kpfonts}
\usepackage[top=5mm,bottom=5mm,left=5mm,right=5mm]{geometry}
\usepackage[small,compact]{titlesec}

\usepackage{listings}
\usepackage{multicol}
\usepackage{wrapfig}
\usepackage{enumitem}
\usepackage{pgfplots}

\pagestyle{empty}

\setlength{\parindent}{0mm}
\setcounter{MaxMatrixCols}{20}

\lstset{basicstyle=\ttfamily\footnotesize}
\lstset{showstringspaces=false}

\newcommand{\R}{\mathbb{R}}
\newcommand{\N}{\mathbb{N}}
\newcommand{\K}{\mathbb{K}}

\newcommand{\skp}[1]{\langle #1 \rangle}

\begin{document}
	\small{
		\begin{multicols*}{4}
			\input{content/\jobname.tex}
		\end{multicols*}
	}
\end{document}