7 * 2/7 + 4 * 1/5 - 2/7 - 3 * 1/5 =* = razy, lub jak ktoś woli `pomnożyć`Pomocy !
2 + 4/5 - 2/7 - 3/5 = 2 + 1/5 - 2/7 = 2 + 7/35 - 10/35 = 70/35 - 3/35 = 67/35
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2 + 4/5 - 2/7 - 3/5 = 2 + 1/5 - 2/7 = 2 + 7/35 - 10/35 = 70/35 - 3/35 = 67/35
2 + 4/5 - 2/7 - 3/5 = 2 + 1/5 - 2/7 = 2 + 7/35 - 10/35 = 70/35 - 3/35 = 67/35