%% 
%%  A DANTE-Edition example
%% 
%%  Example 02-12-1 on page 73.
%% 
%%  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[]{article}
\pagestyle{empty}
\setlength\textwidth{129.70511pt}
\setlength\parindent{0pt}

\usepackage{mdwtab}

\begin{document}
\begin{tabular}{!{\vline[3pt]}l@{\quad}|Mc|}\hlx{shv[1,2]}
   & equations\\\hlx{v[1][10pt]hv[][5pt]}
1st& f(x)=\frac{\sqrt{x^2-1}}{x^2+1} \\\hlx{vhv}
2nd& f(x)=\frac{\sqrt{x^2-1}}{x^2+\frac{1}{x^2}}\\\hlx{vh}
\tabpause{Now the same equations\\
          again!}\hlx{hv}
3rd& f(x)=\frac{\sqrt{x^2-1}}{x^2+1} \\\hlx{vhv}
4th& f(x)=\frac{\sqrt{x^2-1}}{x^2+\frac{1}{x^2}}\\\hlx{vh}
\end{tabular}
\end{document}