$.\left(z+n\right)\left(z+8n\right)$
$3\sin\left(2x\right)=-7$
$7\left(0\right)+12$
$\left(-8z^2\right)\left(6z^5\right)$
$\left(u-3v\right)^4$
$81a^2-36ab+4b^2$
$57^2$
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