%% %% Der Mathematiksatz mit LaTeX, 1. Auflage 2009 %% %% Example 10-9-13 on page 235. %% %% Copyright (C) 2009 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. %% \documentclass[]{ttctexa} \pagestyle{empty} \setcounter{page}{6} \setlength\textwidth{355.65944pt} \AtBeginDocument{\setlength\parindent{0pt}} \StartShownPreambleCommands \usepackage{amsmath} \newcommand*\CMD[1]{\texttt{\textbackslash#1}} \newcommand*\aboxed[2]{\rlap{\boxed{#1#2}}\phantom{\hskip\fboxrule\hskip\fboxsep#1}} \StopShownPreambleCommands \begin{document} \begin{align*} F &= \vec\nabla\Phi \\ &= \frac{\partial\Phi}{\partial x}\hat\imath + [\ldots] \\ &= (3x^3+y)\hat\imath + [\ldots] \\ \aboxed{F}{= 20\hat\imath + [\ldots]} \tag*{\CMD{aboxed}}\\ \boxed{F=20\hat\imath + [\ldots]} \tag*{\CMD{boxed}}\\ \rlap{\boxed{F=20\hat\imath + [\ldots]}} \tag*{\CMD{rlap}\{\CMD{boxed}\}}\\ \aboxed{F}{= 20\hat\imath + [\ldots]} \tag*{\CMD{aboxed}}\\ \ldots &= \ldots \end{align*} \end{document}