<syntaxhighlight lang="python">
import prout
print 'salut'
prout.test()
</syntaxhighlight>
<math>
\operatorname{erfc}f(x) = \frac{2}{\sqrt{\pi}} \int_x^{\infty} e^{-t^2}\,dt = \frac{e^{-x^2}}{x\sqrt{\pi}}\sum_{n=0}^\infty (-1)a_n x^n \frac{(2n)!}{n!(2x)^{2n}}
</math>