$\frac{\cos\left(x\right)^2}{\sin\left(x\right)^2}+1=\csc\left(x\right)^2$

$3xy^3\left(2-2nx+4nx^2-n^2x^3\right)$

$\int\:\left(3y^2+6y\right)^4\left(y+1\right)dy$

$\sqrt{x}\left(\sqrt{x+3}\right)+\sqrt{x}\left(\sqrt{x-1}\right)$

$\frac{\left(x^2y^{-1}z\right)^{-2}}{\left(xy^2\right)^{-4}}$

$-2x+8$

$p^3-5p$