$\left(5-7\right)-\left|\left(5-7\right)\cdot\left(7-5\right)\right|$

$2\left(x-8\right)+\frac{1}{3}\left(2x-6\right)$

$\frac{b}{2a}\cdot\frac{1}{a}$

$-11x^2-4x^2$

$1+\frac{-4x-3}{3+x^2}\:\left(\:8\right)$

$\int\:\left(\sqrt{x}-\frac{1}{\sqrt{x}}\right)^3dx$

$\lim_{x\to0}\left(\frac{2sin\left(x\right)}{x^2}\right)$