$\sen^{2}\theta\left(1-\cot^{2}\theta\right)$

$\int x^{\frac{1}{3}}\left(\frac{1}{x}+x^2+1\right)dx$

$-3x+y,\:x=2\:y\:y=6$

$\int_2^5x\left(5+3e^x\right)dx$

$\ln\left(x^2-1\right)-\ln\left(x+1\right)+\ln\left(x^2+1\right)$

$\int\sec^3\left(\frac{x}{4}\right)\tan\left(\frac{x}{4}\right)dx$

$12-\left(-6\right)$