–7p+2q–3r+5from 2p–3q–7r–11 subtraction
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-9p+5q+4r+17 I think this should be the ans
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Answer:
(2p-3q-7r-11)-(-7p+2q-3r+5)=
2p-3q-7r-11+7p-2q+3r-5=9p-5q-4r-16
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