%% 
%%  An UIT Edition example
%% 
%%  Example 06-14-1 on page 114.
%% 
%%  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{129.70511pt}
\AtBeginDocument{\setlength\parindent{0pt}}
\StartShownPreambleCommands
\usepackage{amsmath}
\newcommand*\CS[1]{\makebox[4.6em][l]{%
  \normalsize\texttt{\textbackslash#1}}}
\StopShownPreambleCommands
\begin{document}
\sffamily\Large
\CS{mbox}$A^{\mbox{text}}_{\mbox{text}}$\\
\CS{text}$A^{\text{text}}_{\text{text}}$\\
\CS{textnormal}$A^{\textnormal{text}}_{\textnormal{text}}$\\
\CS{mathrm}$A^{\mathrm{text}}_{\mathrm{text}}$
\end{document}