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

$\frac{2\sin x\cos\left(x\right)}{\cos\left(2x\right)}$

$-x-12>8$

$\left(6m-3n\right)\left(6m+3n\right)$

$\left(3^{15}\cdot3\right)$

$sec^2y-cot^2\left(\frac{\pi}{2}-y\right)\:=\:1$

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