$3\left(-7\right)^4\:-\:3\left(-7\right)^3\:-\left(-7\right)^2\:+\:3\left(-7\right)\:-\:1\:$

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

$2\left(m+n\right)^2\left(m-n\right)$

$5xy-y=9x+4y$

$120sin\left(x\right)\sin\left(2x\right)+60cos\left(x\right)cos\left(2x\right)$

$\frac{d}{dx}\left(\frac{x^5\left(x-8\right)^2}{\left(x^2+5\right)^7}\right)$

$2\left(\left(\left(9^{-4}\right)^{\frac{3}{4}}\right)^2\right)^{\frac{1}{6}}$