$\frac{d^2}{dx^2}\left(\frac{x+2}{x^2-2}\right)$

$16+18-2\left(3+1\right)^2$

$\lim_{x\to1}\left(\frac{x^2-2x+1}{\ln\left(x\right)-x+1}\right)$

$\frac{dy}{dx}=\frac{5x}{3y^2}$

$1000\left(1.04^3\right)$

$\lim_{x\to6}\left(\frac{\left|2x-12\right|}{x-6}\right)$