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

$\frac{d^2y}{d^2x}\left(2x^2+7\right)$

$\left(60x+10y\right)+\left(10-5y\right)$

$\frac{1}{\sin^2\left(x\right)}\:-\:2\sin^2\left(x\right)$

$6n-14+2n$

$\frac{d^{26}}{dx^{26}}\left(x\cdot\sin\left(x\right)\right)$

$\frac{dy}{dx}=-2x^3-x^2+4x-7$