$\left(+580\right)+\left(+79\right)$
$-8m+5n-\left(3m-n\right)+13m-3n$
$\frac{d^3}{dx^3}\left(x\cdot\cos\left(x\right)\right)4x^2-6x+2$
$34,521\cdot26,015$
$z^2-5z+12$
$2b^2+4b$
$-6y\:-3y+\:2\:-8$
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