$\frac{x-1}{x-1}$
$38x+23x-12x$
$\left(a^m+y^n\right)^2$
$8+n=5\left(n-4\right)$
$\sqrt{4x^2+20}$
$\left(\left(-\frac{1}{5}+\frac{4}{5}x\right)\right)^2$
$\left(-99\right)+\left(-34\right)+\left(-100\right)$
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