%% 
%%  Example 04-01-28 
%%  Copyright (C) 2016 Herbert Voss
%% 
%% ==== 
% Show page(s) 1
%% 
%% 
\documentclass[]{screxa}
\pagestyle{empty}
\setlength\textwidth{158.31393pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage[T1]{fontenc}
\usepackage{mathpazo}
\usepackage{relsize}
%StopShownPreambleCommands
\begin{document}
\[ \sum\sum_{i=1}^n i^2 \quad
   \mathlarger{\sum}\sum_{i=1}^n i^2 \]
\end{document}
