\documentclass[a4paper]{article} \usepackage{lmodern} \usepackage{amssymb,amsmath} \usepackage[T1]{fontenc} \usepackage[utf8]{inputenc} \usepackage{hyperref} \usepackage{listings} \begin{document} \thispagestyle{empty} \section*{Haskell Magic} Squares of all even numbers between 1 and 200: \begin{lstlisting}[language=Haskell] [x^2 | x <- [1..200], even x] \end{lstlisting} \end{document}