%% 
%%  An UIT Edition example
%% 
%%  Example 03-07-2 on page 30.
%% 
%%  Copyright (C) 2010 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{375.57637pt}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\setcounter{equation}{37}
\renewcommand\theequation{3.\arabic{equation}}
\usepackage{esint,array}
\setlength\parindent{0pt}
\StartShownPreambleCommands

\StopShownPreambleCommands
\begin{document}
\[
  \int\mathrm{d}[x]:=\lim_{n\rightarrow\infty}\frac{1}{N}
    \prod_n\left\{\int\limits_{-\infty}^\infty\mathrm{d}x(t_n)\right\}
\]
\end{document}
