$144a^2-168a+49$
$\lim_{x\to0}\left(2\right)\left(\frac{8}{x^2-4}-\frac{x}{x-2}\right)$
$x^2+7x-6=0$
$\int\frac{x^2}{\sqrt[2]{8+2x}}dx$
$x^2+6x-16$
$12-6x>24$
$\left(2a^7+3b^6\right)x\left(4a^2b^4\right)$
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