$11-7-9+3+7$
$5x^2-29x-6$
$\frac{9}{16}x^2+\frac{3}{2}x+1$
$2x^5-6x^4+8x^3-4x^2\:\cdot2x^2$
$-w^2+5w^2+7w^2-3w^2$
$\frac{d}{dx}\left(2x^7-x^2\right)\left(\frac{\left(x-1\right)}{x+1}\right)$
$2\cdot4+8-8\cdot2$
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