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(x+y)^2-(x-y)^2
(2m-n)^2-(m+2n)^2
(3n+2p)^2-(5p-2n)^2
4(3x-2y)^2-9(4x+3y)^2
100(6a+3b)^2-81(3a+2b)^2
29(5x^2+8)^2-36(4x^2-1)^2
(x+y)^2-(x-y)^2
(2m-n)^2-(m+2n)^2
(3n+2p)^2-(5p-2n)^2
4(3x-2y)^2-9(4x+3y)^2
100(6a+3b)^2-81(3a+2b)^2
29(5x^2+8)^2-36(4x^2-1)^2
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Answers & Comments
(x+y)^2-(x-y)^2=(х+у+х-у)(х+у-х+у)=2х(2у)=4ху