%% An UIT Edition example

%%
%% An UIT Edition example
%%
%% Example 04-01-2 on page 32.
%%
%% 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[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{201.70511pt}
\AtBeginDocument{\setlength\parindent{0pt}}
\StartShownPreambleCommands
\setlength\arraycolsep{1.4pt}
\StopShownPreambleCommands
\begin{document}
\[
z=f(x,y) \rightarrow
\begin{array}[b]{|rl|} y &=f(x)\\ y &= 3x^2 \end{array} \rightarrow
\begin{array}[c]{|rl|} x &=f(u)\\ x &= \sqrt{u} \end{array} \rightarrow
\begin{array}[t]{|rl|} v &=f(w)\\ v &= u^2-w^3 \end{array} \rightarrow
f(w)
\]
\end{document}