$\arcsin\left(-\frac{4}{2}\right)$

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

$\frac{\left(72x^8+8x^6+48x^3-4\right)}{-8x}$

$\lim_{x\to0}\left(\frac{\left(x-i\right)}{i\cdot x-1}\right)$

$sin\left(x\right)=\frac{4}{7}sin\left(\theta\:\right)$

$\lim_{x\to1}\left(\frac{-3x+3}{x^2-2x+1}\right)$

$\frac{d}{dx}\left(3x-2\right)\left(x^2-5\right)$