$36a^2-180ab+81b^2$
$\left(-1\right)\cdot12$
$\int\frac{\sin^3\left(ax\right)}{\sin\left(ax\right)}dx$
$4\left(3m+2\right)$
$-2x\le-20$
$\lim_{x\to3}\left(\frac{x^2+9}{x^2-5x+6}\right)$
$49x^1^6-16$
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