1, 1/2 + 2/4 = , 5/6, 4/6 + 1/6 = , 1 4/5, 1/1 + 4/5 = , 1 4/21, 6/7 + 1/3 = , 1 7/8, 7/8 + 2/2 = , 1 8/45, 7/9 + 4/10 = , 19/20, 1/5 + 3/4 = , 1 4/9, 1/1 + 4/9 = , 1 3/8, 6/6 + 3/8 = , 13/15, 2/10 + 2/3 = .

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