Seja $\displaystyle L=\underset{x\rightarrow
5}{\lim}\hspace{.1cm}\frac{2x-10}{x^{2}+7x-35}$
\begin{enumerate}pyB
subst=["$L=0$.","$L=1$.","$L=+\infty$.","$L=-\infty$."]
unsorted=shuffle( subst )
certa[0]=unsorted[0]
opts=unsorted[1]
for i in opts:
    emit( "\n\\item ", i)
pyE
\end{enumerate}
