\documentclass[30pt,landscape]{foils} \usepackage[pdftex]{geometry} \geometry{headsep=3ex,hscale=0.9} \usepackage[pdftex]{color} % for the colored block \usepackage{pause} \rightfooter{} % no more page numbers bottom right \MyLogo{} % no logo bottom left \begin{document} \foilhead{Eine schrittweise aufgebaute Formel} \[ Q(n) = \sum_{i=1}^{n}i^{2} = \frac{1}{3}n(n+\frac{1}{2})(n+1)\pause \] \begin{eqnarray*} \left|\frac{1}{3}n^3 + \frac{1}{2}n^{2}+\frac{1}{6}n\right| &\leq&\left|\frac{1}{3}n^3\right|+\left|\frac{1}{2}n^{2}\right|+ \left|\frac{1}{6}n\right|\pause\\ &\leq&\frac{1}{3}|n^{3}|+\frac{1}{2}|n^{3}|+\frac{1}{6}|n^{3}|\\ &=&|n^{3}| \end{eqnarray*} \end{document}