Answer
$\frac{w^2-9}{4}$
Work Step by Step
$(w^2-8w+15)*\frac{w+3}{4w-20}$
$(w-3)(w-5)*\frac{w+3}{4(w-5)}$
$(w-3)*\frac{w+3}{4}$
$\frac{w^2-9}{4}$
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