$-4n\:+\:10n$
$1+8v+v+3$
$3^2\cdot3^{-1}\cdot2^3\cdot2^{-5}$
$\frac{x^2-7x+2}{x-5}$
$y'-4y^3=0$
$\frac{d}{dx}x^2-y^2=2xy+9$
$\frac{cos\left(-x\right)}{tan\left(-x\right)}-sin\left(x\right)$
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