$\left(2a-a^2\right)^3$

$\frac{2x^3+10x}{\left(x^2+1\right)^2}$

$\left(-4\right)+\frac{1}{2}\left(-4\right)^4-\frac{3}{4}\left(-4\right)^3+10$

$\frac{\text{sen}\alpha\cos\alpha}{\text{tg}\alpha}=1-\text{sen}^2\alpha$

$23\cdot\:\left(-2\right)\cdot\:\left(-10\right)$

$\left(2\cos^{2}2\theta-1\right)^{2}=1-\sin^{2}4\theta$

$\int\frac{\left(2x+7\right)}{x^2+7x+3}dx$