$5m-m$
$\left(2-\frac{1}{1w}\right)^2$
$3x-14x+5+10x$
$\sqrt{2-x}=x$
$\left(1\right)^2-\left(-8xy\right)^2$
$3x^3-13x^2+2x+8$
$\lim_{x\to1}\left(\frac{x^n-1}{x^m-1}\right)$
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