$\int\left(\frac{x^2}{\sqrt{8-4x^2}}\right)dx$

$1,289+453$

$\sin^2\left(x\right)+2\cos\left(x\right)+7$

$\frac{cos\left(x\right)^2}{cot\left(\frac{x}{2}\right)-tan\left(\frac{x}{2}\right)}=\frac{1}{4}sen\left(2x\right)$

$-1001+-10001$

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

$\int8x\cdot\log\left(x\right)dx$