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diagonal summatrix one: 10 20 30 40 50 11 21 31 41 51 12 22 32 42 52 13 23 33 43 53 14 24 34 44 54 matrix two: 10 20 30 40 50 11 21 31 41 51 12 22 32 42 52 13 23 33 43 53 14 24 34 44 54 matrix diagonal sum: 20 42 64 86 108 |