%% 
%%  Example 04-01-14 
%%  Copyright (C) 2016 Herbert Voss
%% 
%% ==== 
% Show page(s) 1
%% 
%% 
\documentclass[]{screxa}
\pagestyle{empty}
\setlength\textwidth{328.62788pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{dotseqn}
%StopShownPreambleCommands
\begin{document}
\begin{equation} F(x) = \int f(x)\,\mathrm{d}x + C        \end{equation}
%
\begin{equation} F(x) = \int_1^\infty f(x)\,\mathrm{d}x=1 \end{equation}
\end{document}
