%% 
%%  Example 07-01-5 
%%  Copyright (C) 2016 Herbert Voss
%% 
%% ==== 
% Show page(s) 1
%% 
%% 
\documentclass[]{screxa}
\pagestyle{empty}
\setlength\textwidth{158.31393pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{amsmath}
\newcommand*\diff{\mathop{}\!\mathrm{d}}
%StopShownPreambleCommands
\begin{document}
\begin{align*}
G(t)   &= \underbrace{\,\int\cdots\!
          \int\!\!}_D\;\diff x\diff y\ldots\\
u_C(t) &= \int\!\,i_C(t)\diff t
\end{align*}
\end{document}
