$-5,9+2,7$
$\left(y+9a\right)\left(y-9a\right)$
$\int_0^{\infty}\left(\frac{10\sin\left(x\right)}{9x}\right)dx$
$25z^2+30z+9$
$-6+12-12+7-3+1$
$\int-21e^{-7x}dx$
$\int-\frac{1}{1+\sqrt{u}}du$
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