$\frac{d}{dx}-x^2$

$4n^2+2n+6=0$

$\frac{d}{dx}\left(\left(\sqrt{e^{\sin\left(x^3\right)}-\sec\left(x^3-1\right)}\right)^3\right)$

$2x+5+7x-5$

$\ln\left(m\right)+9\ln\left(v\right)-9\ln\left(m\right)$

$\frac{d^4}{dx^4}\left(\frac{1}{3x+6}\right)$

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