$\int3x\left(5x^2-4\right)dx$

$64x^2+32xy+4y^2$

$\lim\:_{x\to\:1}\left(\frac{w^2+w-2}{\left(w-1\right)^2}\right)$

$4\csc\left(x\right)+4=\csc\left(x\right)+14$

$\int\:\frac{3x^3-34x^2+84x+68}{x^2-12x+36}dx$

$\int\frac{ax-b}{ax+b}dy$

$\left(n^{2}-19\left(n^{2}+20\right)$