% http://golatex.de/viewtopic,p,91339.html \documentclass[18pt,a4paper]{article} \usepackage[utf8]{inputenc} \usepackage[ngerman]{babel} \usepackage{xsim,tcolorbox} \usepackage{amsmath} \xsimsetup{ exercise/within = section , exercise/the-counter = \thesection.\arabic{exercise} , print-solutions/headings-template=none } \SetExerciseParameters{exercise}{ exercise-template = mine , solution-template = mine } \DeclareExerciseEnvironmentTemplate{mine} {% \tcolorbox[ % colors: colback = white , colframe = black , coltitle = black , % rules: boxrule = 0pt , toprule = 1pt , bottomrule = 1pt , arc = 0pt , % spacing: boxsep = 0pt , left = 0pt , right = 0pt , % title: detach title , before upper = \tcbtitle\par\noindent , fonttitle = \bfseries , title = \XSIMmixedcase{\GetExerciseName}~\GetExerciseProperty{counter} ] } {\endtcolorbox} \DeclareExerciseTranslation{German}{exercise}{Aufgabe} \DeclareExerciseTagging{difficulty} \begin{document} \section{Wellenausbreitung im Vakuum und in Materie} \subsection{Maxwellsche Gleichungen} \begin{align*} \nabla \cdot \vec{E}\left(\vec{r}, t \right) = \frac{\varrho\left(\vec{r}, t \right)}{\varepsilon_0} \end{align*} \begin{exercise}[difficulty=easy] Something stupid \end{exercise} \begin{solution} Here is a nonstupid solution for your problem \end{solution} \subsection{Empirischer Zugang zu Wellengleichungen} \begin{exercise}[difficulty=hard] Eine weitere Aufgabe \end{exercise} \begin{solution} Solution Number 2 \end{solution} \subsection*{Lösungen} \printsolutions[section,difficulty=hard] \section{Wellenausbreitung im Vakuum und in Materie} \subsection{Maxwellsche Gleichungen} \begin{align*} \nabla \cdot \vec{E}\left(\vec{r}, t \right) = \frac{\varrho\left(\vec{r}, t \right)}{\varepsilon_0} \end{align*} \begin{exercise}[difficulty=easy] Something stupid \end{exercise} \begin{solution} Here is a nonstupid solution for your problem \end{solution} \subsection{Empirischer Zugang zu Wellengleichungen} \begin{exercise}[difficulty=hard] Eine weitere Aufgabe \end{exercise} \begin{solution} Solution Number 2 \end{solution} \subsection*{Lösungen} \printsolutions[section] \end{document}