1/2 + 2/3 , 3/4 + 2/5 , 5/9 + 2/27 - 1/3, 8/15 - 2/3 + 3/2, 5/2 + 4/3 + 3/8 , 12/11 - 3 /11, 3/4 - 1/10 - 1/5 - 1/20, 5/2 + 7/2, 20/17 - 3/17, 5/8 - 3/16 + 1/4.

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