\documentclass[a4paper,10pt]{article}
\usepackage{myXsim}

\author{Benjamin Bertrand}
\title{Dérivation - exercices}
\date{septembre 2020}

\thispagestyle{empty}

\DeclareExerciseCollection{banque}
\xsimsetup{
    step=4,
    exercise/the-counter=3
}

\begin{document}

\renewcommand{\arraystretch}{1}
\input{exercises.tex}
\printcollection{banque}
\end{document}
