%% 
%%  Ein Beispiel der DANTE-Edition
%%  Mathematiksatz mit LaTeX
%%  3. Auflage
%%  Beispiel 06-06-2 auf Seite 106.
%%  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{146.40707pt}
\AtBeginDocument{\setlength\parindent{0pt}}
%StartShownPreambleCommands
\usepackage{amsmath}
\DeclareFontFamily{U}{mathb}{\hyphenchar\font45}% from mathabx:
\DeclareFontShape{U}{mathb}{m}{n}{
      <5> <6> <7> <8> <9> <10> gen * mathb
      <10.95> mathb10 <12> <14.4> <17.28> <20.74> <24.88> mathb12
      }{}
\DeclareSymbolFont{mathb}{U}{mathb}{m}{n}
\DeclareFontSubstitution{U}{mathb}{m}{n}
\let\dot\relax   \DeclareMathAccent{\dot}{0}{mathb}{"39}
\let\ddot\relax  \DeclareMathAccent{\ddot}{0}{mathb}{"3A}
\let\dddot\relax \DeclareMathAccent{\dddot}{0}{mathb}{"3B}
\let\ddddot\relax\DeclareMathAccent{\ddddot}{0}{mathb}{"3C}
%StopShownPreambleCommands
\begin{document}
\Large $x\dot{y} ~ x\ddot{y} ~ x\dddot{y} ~ x\ddddot{y}$
\end{document}