$2\cdot1\cdot\left(-3\right)\cdot\left(-4\right)\cdot\left(-9\right)$
$\left(x+3y\right)\cdot\left(x\:+\:4y\right)$
$z^4-64w^2$
$3\left(-1\right)^2-5\left(-1\right)-1$
$22mn-33mo+44$
$-20ab+11ab$
$x-9+72$
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