%% 
%%  An UIT Edition example
%% 
%%  Example 04-04-4 on page 38.
%% 
%%  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}
\AtBeginDocument{\setlength\parindent{0pt}}
\setcounter{equation}{7}
\renewcommand\theequation{4.\arabic{equation}}
\StartShownPreambleCommands

\StopShownPreambleCommands
\begin{document}
\begin{equation}
\sum_{\makebox[0pt]{${{1\le i\le \sqrt{p^{-3}}\atop{%
  {1\le j\le q\atop 1\le k\le r}}}}$}}a_{ij}b_{jk}c_{ki}
\end{equation}
\begin{equation}
\sum_{\makebox[0pt]{${{\scriptscriptstyle 1\le i\le \sqrt{p^{-3}}\atop{%
  {1\le j\le q\atop 1\le k\le r}}}}$}}a_{ij}b_{jk}c_{ki}
\end{equation}
\end{document}