Answer
$\frac{r-2k-6}{9+p^3}$
Work Step by Step
$\frac{r-5}{9+p^3}-\frac{2k+1}{p+p^3}$
$\frac{r-2k-5-1}{9+p^3}$
$\frac{r-2k-6}{9+p^3}$
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