%% 
%%  Ein Beispiel der DANTE-Edition
%%  Mathematiksatz mit LaTeX
%%  3. Auflage
%%  Beispiel 10-09-10 auf Seite 232.
%%  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{170.40707pt}
\AtBeginDocument{\setlength\parindent{0pt}}
\setcounter{equation}{29}
\renewcommand\theequation{10.\arabic{equation}}
%StartShownPreambleCommands
\def\itemMath#1{%
  \raisebox{-\abovedisplayshortskip}{%
    \parbox{\linewidth}{%
      \begin{equation}#1\end{equation}}}}
%StopShownPreambleCommands
\begin{document}
\begin{itemize}
\item \itemMath{y = f(x)}
\item $ y = f(x) $
\item \itemMath{g(x)=\int f(x)\mathrm{d}x}
\end{itemize}
\end{document}