$\frac{2x^3-6x^3+2x^2+1}{2x+1}$
$4m+44+2m$
$\frac{dy}{dx}+ycos\left(x\right)=2cos\left(x\right)$
$\left(2x-\frac{1}{3}x^2\right)^2$
$\left(4r^2\cdot r\cdot2\right)^2$
$49x^2-14xy+y^2$
$8-8+7b+7b$
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