$\left(19x^2-10x^3+x^5-14x+6\right)\left(x^2+1-2x\right)$
$4\left(2x-1\right)^2+10=-13\left(2x-1\right)$
$7x^2-4x^2+6x-3+2x^2+2$
$4\left(3s+1\right)+s$
$\frac{d}{dx}\left(ln\left(x-1\right)+e^{x+1}\right)$
$ab^2+ab^2+7ab^2+9ab^2+21b^2$
$\cos^230$
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