$-10abc\:+\:3cab$
$7.8+3.584m+\frac{23}{100}$
$\frac{1}{5}^{2x+1}=\frac{1}{125}^{x-5}$
$4-2b=-2b+4$
$22^2+311+7$
$\frac{x^2-2x-15}{9-x^2}$
$\left(\frac{5}{4}q+1\right)+\left(q-4\right)+\left(-\frac{1}{4}q+2\right)$
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