$\int\frac{3x}{\left(2-x^2\right)^2}dx$
$9a^2-30a+35$
$\tan\left(x\right)xtan\left(x\right)$
$4n^2+n-33=0$
$\left(2a-3b+5\right)^2$
$g-2g+7$
$\int4\sec^2\left(2x\right)dx$
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