$h\left(x\right)=\left\{2x+2\:x\le-1\right\}$

$\frac{x-arctan\left(x\right)}{x}$

$6-\sqrt[2]{x+2\:}\:=x-4$

$\left(5x-2\right)\cdot\left(x^3-4x^2+2x-1\right)$

$\frac{x}{2}+\frac{x}{3}<\frac{x}{4}-\frac{1}{6}$

$\frac{d}{dx}\frac{e^{3x}-e^{5x}}{e^{4x}}$

$\left(mn^2-4m+3m^2\right)\left(2m^2n+8m^2-2n^2-3m\right)$