$8x^6-6x^54x^4+12x^2+20$
$w^2+20w+12$
$52mn-36+28mn^3$
$\frac{dy}{dx}\left(cos\left[sin\left(2x+5\right)^{\frac{1}{2}}\right]\right)$
$-224-974$
$12\left(28-23\right)+9\left(62-47\right)$
$4m-8mn-4m+8n$
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