$\frac{x^2+5x+6}{x^2-2}$

$2\left(1-\cos^2\left(t\right)\right)+cos^2t=1+sen^2t$

$\frac{dy}{dx}-wx^2=0$

$-\frac{3pq}{r}+\frac{5p^4p^{-3}r^{-1}}{q}-\frac{2r^{-1}p^{-2}}{p^{-3}q^{-1}}$

$\lim_{x\to1}\left(\frac{\ln\left(x\right)-x+x^2}{\left(1-x\right)\cdot\ln\left(x\right)}\right)$

$\int\frac{\left(x^2\right)}{\left(x-4\right)\left(x+5\right)}dx$

$\int3a^2dx$