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

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