$3x+5a+10a-2x-3a$

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

$6x^{a+b}\left(7x^a+5x^b+x^{2a+b}-4\right)$

$\frac{d}{dx}+2xy=\frac{6x}{y^2}$

$\frac{d}{dx}\left(x+y\:=\:sen\left(y\right)\right)$

$\int\frac{r}{\left(h^2+r^2\right)^{\frac{3}{2}}}dr$

$11\left(5\right)+\left(-9\right)$