$\frac{x^2y^{-3}}{xz^{-2}}$
$2\sqrt{25}$
$2\left(-2\right)\left(3\right)$
$\left(-4^4\right)x\left(-4\right)^3$
$2w-15<19$
$\frac{\left(x^3-9x^2+27x+27\right)}{\left(x-3\right)}$
$\frac{9^{-2}\cdot9^7}{9^3}$
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