$\left(2x\right)^3-\left(3\right)^3\:\:2x+3$

$-107+25$

$\frac{dy}{dx}=x^3+2x-1$

$\frac{3x^4y^{-5}}{4x^{-2}y^3}$

$\frac{x\left(x\left(x-6\right)+4\right)}{\left(x+6\right)\left(x-6\right)}$

$8\frac{dy}{dx}-4y=xy^3$

$\lim_{x\to0}\left(2\sin\left(x\right)^{8\tan\left(x\right)}\right)$