Решите задачу:
2) (m+8)²- (m-2n)(m+2n)
4) (n+15)²- n(n-19)
6) (6-5m)(5m+6) + (5m-4)²
2) (m+8)²- (m-2n)(m+2n)
4) (n+15)²- n(n-19)
6) (6-5m)(5m+6) + (5m-4)²
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