Answer
$y-6$
Work Step by Step
$\frac{y^{2}}{y+6}-\frac{36}{y+6}=\frac{y^{2}-36}{y+6}=\frac{(y-6)(y+6)}{y+6}=(y-6)\times\frac{y+6}{y+6}=(y-6)\times1=y-6$
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