$\cos\left(2x\right)+\sin\left(x\right)=4\sin^2\left(x\right)$

$\int x\left(5+3x^2\right)^8dx$

$17-5\left[4.13-6\left(2+71\right)+8\right]$

$2\sqrt{45}$

$\left(-\frac{2}{3}a+5b-7\right)\left(\frac{1}{5}a-2ab^2+3ab-9a^2\right)$

$\left(\frac{4a}{b}+8c\right)^2$

$\frac{x^{\frac{3}{3}}}{b^{2}}$