$y=\left(3x+8\right)\left(9x+6\right)$
$\int\:4x^3arccot\left(2x^2\right)dx$
$4a^2b+6ab-9a^3b^2$
$9-\left(-5\right)-10+6$
$\left(5z-4\right)^3$
$5.\:\left(-100\right)$
$\left(x-3\right)\left(x^2-9\right)\left(x+3\right)$
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