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\documentclass{article}
\usepackage[tight,designv]{web}
\usepackage{insdljs}
\usepackage[testmode,quiet]{rangen}
%\usepackage[seed=30,quiet]{rangen}
\parindent0pt\parskip6pt
\begin{document}
\RandomL{\a}{1,-1}$\texttt{\string\a}=\a, \cfmt\a x$
\RandomP[index=5]{\a}{1,x,x^2,x^3}$\a$
\RandomI{\indx}{5}
\RandomP[index=\indx]{\q}{1+16,\cos(\pi),\pi\sin(\pi),\frac{d}{dx}\frac{1}{2}x^2,{\int \cos(x)\,dx}}
$\displaystyle\q$
\RandomI{\i}{2}\i
\RandomP[index=\i]{\q}{1+16, \frac{d}{dx}\frac{1}{2}x^2}
\RandomP[index=\i]{\a}{17,x}
$ \q = \a $
\RandomP{\q}{1+16,\frac{d}{dx}\frac{1}{2}x^2}
\RandomP[index=\iOf\q]{\a}{17,x}
$\displaystyle\q = \a $
\RandomI{\i}{6}RandomI=\i
\RandomL[index=1]{\a}{17,\rPI,3/4,\rE,88,1/2}\a\quad index=\iOf{\a}
\RandomL[index=\i]{\a}{17,\rPI,3/4,\rE,88,1/2}\a\quad index=\iOf{\a}
\RandomL{\a}{17,\rPI,3/4,\rE,88,1/2}\a\quad index=\iOf{\a}
In practice, \verb!\RandomI! can be used to select one of n problems. Here, we have
selected the
\RandomI{\i}{6}
\ifcase\i\relax\or
first\or
second\or
third\or
fourth\or
fifth\or
sixth\fi\space problem.
\end{document}
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