$\frac{\left(xy-3y+x-3\right)}{\left(xy+2y-x-2\right)}$

$\lim_{x\to\infty}\left(\left(n^{\frac{3}{2}}\right)\left(\sin\left(\frac{1}{n}\right)\right)\right)$

$\frac{\left(-8\right)^7}{\left(-8\right)^4}$

$4x^2-x>-2$

$-4^6$

$\:\left(3xy-5\right)\left(4xy-2\right)$

$\left(x-4\right)\left(x^2-16\right)$