$\left(-5^{-3}\right)^{-1}$
$42,67-3,47$
$5b^{4}-10b^{3}-15b^{2}+10b\text{by}5b$
$\int\frac{x+1}{x^2+2x+8}dx$
$2x^3y^3\cdot x^2$
$16y^2-40y+16y^2$
$\left(81rs\right)^{-\frac{1}{4}}$
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