$\left(3x+2\tan\left(x\right)\right)^2$

$\lim_{x\to0}\tan\left(2x\right)\cos\left(8x\right)-\tan\left(2x\right)$

$4y^2-12y+81$

$\lim_{x\to-1}\left(\frac{4x+4}{x^3+6x^2+5w}\right)$

$\frac{512x^{27}-27y^3}{2x^3-y}$

$\frac{1}{n}-\frac{1}{n+1}$

$\frac{d^2}{dx^2}\left(x^3-3x^2y+2xy^2=12\right)$