$\left(x+4\right)\left(x+5\right)<\left(x-3\right)\left(x-2\right)$

$939\:+\:648\:=\:$

$4tanx-\sqrt{3}=0$

$\lim_{x\to3}\left(\sqrt{x^2-9}\right)$

$\left(\frac{3}{4}xyz\right)\left(\frac{2}{5}z^4\right)$

$\int\left(\frac{5}{x\sqrt{25-ln^2\left(x\right)}}\right)dx$

$6z-11\ge7$