Correcto: 52 + 21 = 73, 24 + 13 = 37, 18 + 21 = 39, 53 + 35 = 88, 37 + 22 = 59, 65 + 14 = 79, 32 + 33 = 65, 73 + 21 = 94, 45 + 43 = 88, 61 + 32 = 93, 80 + 15 = 95, 16 + 32 = 48, 33 + 55 = 88, 22 + 66 = 88, 52 + 25 = 77, Incorrecto: 52 + 21 = 72, 24 + 13 = 47, 18 + 21 = 29, 53 + 35 = 98, 37 + 22 = 69, 65 + 14 = 89, 32 + 33 = 75, 73 + 21 = 84, 45 + 43 = 98, 61 + 32 = 73, 80 + 15 = 96, 16 + 32 = 49, 33 + 55 = 98, 22 + 66 = 98,

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