$x-16=2$

$2x^3-55x^2+300x$

$\ln\left(x^{x^x}\right)$

$\lim_{x\to-\infty}\left(\frac{x^2+4x+1}{2x+7}\right)$

$\frac{d^2}{dx^2}\left(\frac{1}{7x^2}+\frac{1}{5x}\right)$

$\left(1+\cos\left(2x\right)\right)\left(1-\cos\left(2x\right)\right)=\sin^2\left(2x\right)$

$\frac{dy}{dx}=\left(x-7\right)e^{-2y}$