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Prove that actually after MixColumn transformation of the state array 87 F2 4D 97 6E 4C 90 EC 46 E7 4A C3 A6 8C D8

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87 F2 4D 97 6E 4C 90 EC 46 E7 4A C3 A6 8C D8 95 In the resulting state array 47 40 A3 4C 37 D4 70 9F 94 E4 42 ED A5 A6 BC element (2.3) is actually 70. Show your calculations, provide necessary explanations

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