%% 
%%  Ein Beispiel der DANTE-Edition
%%  Mathematiksatz mit LaTeX
%%  3. Auflage
%%  Beispiel 08-01-1 auf Seite 154.
%%  Copyright (C) 2018 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[10pt]{screxa}
\pagestyle{empty}
\setlength\textwidth{194.40707pt}
\AtBeginDocument{\setlength\parindent{0pt}}
\usepackage{array}
\setlength\arraycolsep{2pt}
\usepackage[scaled=0.9]{beramono}
%StartShownPreambleCommands

%StopShownPreambleCommands
\begin{document}
\begin{tabular}{@{}>{%
  \ttfamily\textbackslash}ll@{}}
parskip:    & \the\parskip\\
thinmuskip: & \the\thinmuskip\\
medmuskip:  & \the\medmuskip \\
thickmuskip:& \the\thickmuskip
\end{tabular}\par
\the\muexpr(\thinmuskip-\medmuskip)*2\relax\\
\the\glueexpr\belowdisplayshortskip+%
             \belowdisplayskip\relax
\end{document}