a b a^2-b^2 (a+b)(a-b) (a+b)^2 a^2+2ab+b^2 (a-b)^2 a^2-2ab+b^2
4 5 -9 -9 81 81 1 1
8 2 60 60 100 100 36 36
3 6 -27 -27 81 9 9 9
2 4 -12 -12 36 36 4 4
6 3 27 27 81 81 9 9
1 7 -48 -48 64 64 36 36
9 1 80 80 100 100 64 64
5 8 -39 -39 169 169 9 9
7 9 -32 -32 256 256 4 4
10 11 -21 -21 441 441 1 1
12 13 -25 -25 625 625 1 1
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