$-2x^5y^{-3}z^{-4}$

$\left(a+1\right)\left(a-1\right)\left(a-2\right)$

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

$\frac{sin\left(x\right)}{cosec\left(x\right)-cos\left(x\right)cot\left(x\right)}$

$\frac{\frac{v}{5}}{\frac{1}{0}}$

$\log_{50}+\log_{200}$

$\lim_{x\to\pi}\left(\frac{\sin^2x}{x-\pi}\right)$