20 - 50 - 10 . 3, 120 - (50 - 10) . 3, 41 - 6 . 8 - 7, 6 - 6 . (8 - 7), 181 - 20 . 9 + 1, 200 - 20 . (9 + 1), 67 - 4 + 7 . 9, 99 - (4 + 7) . 9, 27 - 3 + 6 . 4, 36 - (3 + 6) . 4, 1 - 81 : 9 - 8, 81 - 81 : (9 - 8), 3 - 24 : (4 + 4), 10 - 24 : 4 + 4, 54 - 7 . 9 - 9, 0 - 7 . (9 - 9), 17 - 2 . 1 + 15, 32 - 2 . (1 + 15),

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