Представьте выражение в виде произведения:
1) (2ab+5)²-49
2) (5x+2y)²-9y²
3) p²- (3p+1)²
4) (2a+b)²-(a-2b)²
5) (x+y)²-(x-y)²
6) (4p-q)²-(2p+3q)²​
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