$\left(-9\right)-\left(-4\right)$
$\left(-9\right)-\left(-6\right)$
$8-\left(-1\right)$
$-5-9$
$3-\left(-6\right)$
$-1+3$
$-7-3$
The power of a product of factors is equal to the product of each factor to the same power: $\left(b\cdot c\right)^n=b^n\cdot c^n$.
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