$11x^2-98x-120$
$\int x\left(x^2-9\right)^3dx$
$p^2-21p+20$
$\cos^2\left(9x\right)-\sin^2\left(9x\right)$
$\:f\left(x\right)\:=\:2\:x\:2+1\:\:\:$
$\left(-6a+4b+11c\right)-\left(-4c-4b+7a\right)$
$\lim_{x\to0}\left(\frac{x^2+1}{2x+1}\right)$
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