$\int\left(\csc ay\cot ay\right)dx$

$\lim_{x\to3}\left(\frac{\sqrt{4x^2+20x}}{x-3}\right)$

$\frac{d}{dx}cos9x-1$

$\int15\sqrt{2}\left(\sin\left(100x\right)\right)dx$

$\left(x-4\right)\left(x-1\right)\left(x+2\right)\left(x-3\right)$

$\frac{d}{dx}\left(\ln\left(x^2\sin\left(x\right)\right)-\ln\left(x^2+4x+1\right)^5\right)$

$\left(6h^5+10t^8\right)^2$