$\left(2x^3y-2z^4\right)^3\:\:\:\:\:\:\:\:\:\:\:\:$
$\left(45.-12\right)\left(-38.4\right)$
$\left(82-x\right)^2$
$x^2+5x-6-\left(x^2-2x+1\right)$
$4sin^2x-4sin^4x=sin^2\left(2x\right)$
$20+7+20+12$
$2w-6-3w$
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