Evaluate (-9^2+21)/-3 - Math help

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$\frac{- 9^{2} + 21}{- 3}$

Simplify the numerator.

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Raise $9$ to the power of $2$ .

$\frac{- 1 \cdot 81 + 21}{- 3}$

Multiply $- 1$ by $81$ .

$\frac{- 81 + 21}{- 3}$

Add $- 81$ and $21$ .

$\frac{- 60}{- 3}$

$\frac{- 60}{- 3}$

Divide $- 60$ by $- 3$ .

$20$

Evaluate (-9^2+21)/-3

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