$\frac{x-4}{5x+2}\:=\:\frac{x\:+\:10}{3x+18}$

$\log_{10}\left(\frac{x^9y^5}{z+2}\right)$

$\int\left(\sin\left(\frac{1}{2}\cdot x\right)\right)$

$b\left(2a+1\right)$

$\left(-2x^3\right)\left(5x^{-4}\right)$

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

$-\frac{5}{2}\cdot x+\frac{2}{3}\le-\frac{11}{6}$