$\sqrt{a^2}+b^2$

$cos\left(x\right)sin\left(x\right)=\frac{1-cos\left(2x\right)}{4}$

$4x\:-\:9y\:+\:2z\:=\:5$

$\int\left(\frac{x-1}{2x}\right)dx$

$121-f+25f^2$

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

$\left(47\right)\cdot\left(88\right)\cdot\left(-78\right)\cdot\left(-20\right)$