1 1/2 - 5/10 + 4/4 = , 1 1/6 - 5/6 + 1/3 = , 1 8/9 - 7/7 + 8/9 = , 1 2/3 - 1 + 6/9 = , 2 3/4 - 3/4 + 2 = , 1 11/12 - 1/2 + 2/3 + 3/4, 1/6 - 5/24 - 1/60 - 1/40, 1 3/10 - 4/5 + 3/6 = , 13/20 - 2/5 + 2/8 = , 1 4/7 - 3/3 + 4/7 = , 3/5 - 1/10 + 1/2 = , 1/12 - 5/14 + 10/21 - 3/4, 5/14 - 1 - 18/28 =, 11/3 - 2 - 10/15 =,

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