$49m^4-16n^{10}$
$\left(5a-3b+m\right)-\left(-a-2b+3m\right)$
$-7x^2+2x+3=0$
$31\:-\left(-5\right)$
$\frac{125-343b^{15}}{5-7b^5}$
$\frac{d}{dx}x^2+xy-y^2$
$10\cdot17-\left(-44\right)$
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