$\left(-4x^2yz\right)^3$
$\left(4a^4-7y^2\right)^2$
$4-2b=-2b+4$
$4^3\:x\:\:4^{-6}\:$
$x^2-16x+64=130$
$\left(4-4n^{6n+2}\right)^2$
$3x-6\left(3x+5\right)=5\left(x+2\right)$
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