$\int\frac{x^2+x+1}{x\left(x^2+4\right)}dx$

$e^x\sin\left(y\right)dx+e^x\cos\left(y\right)dy$

$\left(4s+2\right)\left(5s^{2\:}+10s+3\right)$

$\left(x^2-x\right)\:\frac{dy}{dx}=y$

$\lim_{x\to-2}\left(\frac{x^3+8}{x^2+x-2}\right)$

$\int\frac{sen\left(\sqrt{x}\right)}{\sqrt{x}cos^2\left(\sqrt{x}\right)}dx$

$\sqrt{36x^3}y^4$