subtract the sum of 2m-7n+p from the sum of m-n+p and 3m-2n-2p
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ATQ,
= (2m - 7n + p) - (m - n + p + 3m - 2n - 2p )
= 2m - 7n + p - 4m - 3n - p
= - 2m - 7n
- 2m - 7n is the required answer.
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