%% 
%%  Example 02-13-1 
%%  Copyright (C) 2016 Herbert Voss
%% 
%% ==== 
% Show page(s) 1
%% 
%% 
\documentclass[]{screxa}
\pagestyle{empty}
\setlength\textwidth{328.62788pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{amsmath}
%StopShownPreambleCommands
\begin{document}
$\boxed{f(x)=x\quad\text{this is text in math}}$
\par\medskip\sffamily\huge
$A^{\mbox{text}}_{\mbox{text}}$\quad $A^{\text{text}}_{\text{text}}$\quad
$A^{\textnormal{text}}_{\textnormal{text}}$\quad $A^{\mathrm{text}}_{\mathrm{text}}$
\end{document}
