$\int\frac{1}{2x^2\left(\sqrt{x^2-9}\right)}dx$
$\int\left(\frac{\tan\left(x\right)}{\cos\left(x\right)}\right)dx$
$3a^2-19a+6$
$112x^3-175x$
$x^5-2x^4+x^3$
$\lim_{x\to-1}\left(3\left(x+2\right)\right)\left(x+1\right)$
$\int cos^6\left(3t\right)dt$
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