$\frac{4^{-2}y^{-3}}{4y^{-2}}$
$f\left(x\right)=2\left(x+7\right)^2+8$
$\sin^2+1-\cos^2=2\sin^2$
$9\cdot9\cdot9$
$2x=2$
$27n-9m$
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