%% %% An UIT Edition example %% %% Example 09-17-13 on page 193. %% %% 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}} \StartShownPreambleCommands \usepackage{mathtools,esint} \newcommand*\diff{\mathop{}\!\mathrm{d}} \StopShownPreambleCommands \begin{document} \begin{align*} \iiint\limits_Rf(x,y,z)\diff R &= \int\limits_{z_1}^{z_2} \int\limits_{\varphi_1(z)}^{\varphi_2(z)} \int\limits_{r_1(\varphi,z)}^{r_2(\varphi,z)} F(r,\varphi,z)r\diff r\diff\varphi\diff z\\ %\ArrowBetweenLines[\Downarrow]% left hand side \ArrowBetweenLines* % right hand side (\Updownarrow is the default) &= \int\limits_{\varphi_1(z)}^{\varphi_2(z)} \int\limits_{\vartheta_1(\varphi)}^{\vartheta_2(\varphi)} \int\limits_{r_1(\vartheta,\varphi)}^{r_2(\vartheta,\varphi)} F(r,\vartheta,\varphi)r^2\sin\vartheta\diff r\,r\diff\vartheta\diff\varphi \end{align*} \end{document}