Answer
$a^{3}$$b^{4}$
Work Step by Step
Use the exponent product rule: $x^{y}$ $\times$ $x^{z}$ = $x^{y+z}$
$a^{6}$ $\times$ $a^{-3}$ = $a^{3}$
$b^{-4}$ $\times$ $b^{8}$ = $b^{4}$
$a^{3}$$b^{4}$
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