$\int cos^2\left(x\right)cot\left(x\right)dx$

$log2\left(4x\right)\:-\:log2\left(3\right)=4$

$-xy2+6xy2$

$\int\left(\frac{x^6}{\left(x^7+2\right)^9}\right)dx$

$\left(84\right)\left(-15\right)$

$\sqrt{2}-3\sqrt{2}+7\sqrt{2}$

$\int\ln\left(x\right)\cdot x^{-\frac{1}{3}}$