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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}