p-8+(-p2-p-7)
Remove parentheses.
p-8-p2-p-7
Subtract p from p.
-8-p2+0-7
Add -8-p2 and 0.
-8-p2-7
-8-p2-7
Subtract 7 from -8.
-p2-15
Simplify p-8+(-p^2-p-7)
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