(2m+n-p)²

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(2m+n-p)²(2m+n-p)²(2m+n-p)²(2m+n-p)²=4m²+n²+p²+4mn-4mp-2np

(2m+n-p)²
(2m+n-p)²

(2m+n-p)²
(2m+n-p)² = 4m² + n² +p² +4mn - 4mp - 2np