Difference of Squares (algebra)

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Can you name the product of these differences of squares (algebra)?

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(a+b)*(a-b)producta^2 - b^2
811*789
65*55
530*470
325*275
87*73
32*28
604*596
99*81
509*491
107*93
308*292
310*290
615*585
715*685
54*46
(a+b)*(a-b)producta^2 - b^2
808*792
814*786
43*37
21*19
112*88
714*686
205*195
105*95
340*260
76*64
713*687
510*490
415*385
725*675
208*192

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