"Even easier DIN A4"

Klausuren/exam.tex

-\documentclass[addpoints,12pt,
+\documentclass[a4paper,addpoints,12pt,
 noanswers]  % answers or noanswers
 {exam}
 
 \usepackage[utf8]{inputenc}
 \usepackage[T1]{fontenc}
-\usepackage[a4paper]{typearea}
+%\usepackage[a4paper]{typearea}
 \usepackage{graphicx,amssymb,amsmath,multirow,tabularx,pgf,pgfpages}
 \usepackage{libertine}
 \usepackage[ngerman]{babel}