$5x\:+\:3x\:-\:6x\:$

$\left|\left(-19\right)+\left(-1\right)\right|\cdot\left(23-21\right)\cdot\left|\left(45+\left(-69\right)\right)\right|$

$3x\ge-\frac{2}{3}$

$\log\left(x-6\right)+2\log\left(x\right)=\log\left(x+6\right)$

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

$g\left(t\right)=\frac{\left(1-\sqrt{t}\right)}{\sqrt{t}}$

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