$\sqrt[2]{27a}.\sqrt[3]{9a^2}$
$-a^2-10ab-25b^2$
$20+90+511b$
$\left(-8\right)\left(-12\right)\left(-2\right)\left(0\right)$
$5c^2+4c+1-c+8$
$2y+5\:+7y\:+-\:3$
$\left(x^2+3\right)\left(x^2+8\right)$
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