$\frac{d}{dx}2x^{-3}+4x+\pi$
$10n^2+21n+9=0$
$18-4\:\cdot3$
$64m^2\:-n^2$
$\frac{dy}{dx}=\frac{y}{3}-3x$
$\int\left(\frac{6x^3+2x^2-x}{x^5}\right)dx$
$\sqrt[3]{5^9}.\sqrt[8]{16^4}$
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