$1\frac{1}{z^2}$
$\left(-2x^{-1}-y^{-1}\right)^3$
$3\left(5-3w\right)$
$\lim_{x\to5}\left(x+45\right)$
$36x^2-9x=-1$
$\left(2x-4\right)\left(3x-1\right)=\left(x-4\right)\left(x-3\right)-4-6x^2$
$4m-2n+6n+m-5n$
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