$\left(5x^3+8\right)^2$
$-\left(5+4-9-6+2-7\right)$
$z^2-10z=-5$
$5^3\cdot10^3$
$=\frac{2\left(-7\right)^2+3\left(-7\right)-27}{\left(-7\right)-3}$
$-49x^2-490x-1200$
$\left(y^{-5}\right)^9$
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