(6/10) + (30/8) =
(2/5) – (1/10) =
(1/3) + (2/6) – (3/9) =
(4/12) – (2/24) =
(6/10) – (2/20) =
(15/9) – (2/5) =
(40/50) – (5/10) =
(7/10) – (1/3) =
(3/7) – (1/4) =
(23/7) + (2/5) =
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