$\frac{x}{x^2y^2}$
$15x+2=47$
$9:-2$
$\frac{m^{3m}-n^{-m}}{m^3-x^{-1}}$
$20+90+5$
$\int\frac{5r^2}{r+1}dr$
$\left(-59\right)-\left(-49\right)$
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