$\left(m-6\right)\left(m+9\right)$
$9\tan x+7=5\tan x+3$
$\left(7x^2-1\right)^2$
$\int in\left(1+\sqrt{t}\right)\:dt$
$x^2y-3xy'+4y=0$
$5\left(3g+3\right)$
$\int\frac{3}{\left(x-2\right)^3}dx$
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