$\lim_{x\to-2}\left(\frac{5x+10}{\sqrt{2x+5}-1}\right)$

$\int e^{-mv\left(v\right)\cos\left(v\right)}dv$

$x\::\:2\:-\:4\:=\:14$

$\frac{-7x}{2^3+21+y}-yz^2-9xyz+3yz$

$-200\cdot9$

$\left(\cos\left(x\right)\left(\sqrt{a^2+c^2}\right)\left(-\cos\left(x\right)\right)\right)$

$\left(x+6\right)\left(x+3\right)\ge\left(x+1\right)\left(x-1\right)$