$\sqrt{x+2}+x=10$
$2x^3b-x^2b^2+xb^3$
$11q+5p-9q+7p$
$x^6-4x^3+x$
$\lim_{x\to0}\left(\frac{1}{cos\left(x\right)+x}\right)$
$\frac{d}{dx}\left(3+x^2\right)\left(2+x\right)^3$
$\sec^2\left(x\right)-2\cdot\tan^2\left(x\right)$
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