13 - 11 = ?, 1, 2, 12, 9, 26 - 15 - 1 = ?, 10, 9, 11, 12, 36 - 7 = ?, 28, 29, 30, 32, 39 - 9 - 2 = ?, 32, 24, 28, 12, 50 - 10 = ?, 40, 50, 32, 35, 12 + 2 + 10 = ?, 14, 24, 30, 28, 23 - 19 = ?, 3, 4, 5, 6, 45 - 8 = ?, 27, 38, 37, 39, 97 - 10 = ?, 77, 90, 67, 87, 30 - 11 - 2 = ?, 17, 18, 27, 28, 76 - 23 = ?, 63, 43, 33, 53, 23 - 12 = ?, 11, 10, 15, 12, 98 - 12 - 3 = ?, 73, 83, 63, 53, 67 - 59 = ?, 9, 8, 7, 5, 66 - 11 - 10 = ?, 45, 35, 55, 25.

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