Answer
$-(a^2+2a+4)$
Work Step by Step
$(a^3-8)/(2-a)$
$(a-2)(a^2+2a+4)/(2-a)$
$-1*(a-2)*-1*(a^2+2a+4)/(2-a)$
$(2-a)*-1*(a^2+2a+4)/(2-a)$
$-(a^2+2a+4)$
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