$-\frac{1}{sin\left(x\right)-csc\left(x\right)}=tan\left(x\right)sec\left(x\right)$

$\frac{d}{dx}x^2y+2y^2-y=2$

$\frac{3x}{\sqrt{2}}$

$\left(x^{\frac{5}{3}}+-x^{-\frac{5}{3}}\right)^3$

$u^2-14u+14$

$\lim_{x\to-4}\left(\frac{x-4}{\sqrt{x+4}}\right)$

$\int\tan^4\left(x\right)\sin^2\left(x\right)dx$