Caminata aleatoria simple
Caminata aleatoria de Weierstrass
\frac{1+sin(x)}{y}
Dividing $x^2+1$ by $y^2$ gives \[\frac{x^2+1}{y^2}\]
\int_{0}^{\pi}\frac{x^{4}\left(1-x\right)^{4}}{1+x^{2}}dx =\frac{22}{7}-\pi
Dividing $x^2+1$ by $y^2$ gives \[\frac{x^2+1}{y^2}\]