$\frac { \vec { \nabla } } { \prod _ { n } \atop \hat { x } }$

$t^2+\:8t\:-\:80$

$\frac{x-4x}{2y^2+3y^2-20}$

$-8x^3+14x^2-16x-28$

$\lim_{x\to1}\left(\frac{8x-8}{ln\left(x\right)-sin\left(\pi x\right)}\right)$

$\frac{4x}{6x^2+13x-5}$

$\int\left(\csc\left(x\right)+1\right)\cdot\csc\left(x\right)dx$