4/3 + 7/5 (1/2 + 4/9) - 1/5 = 4/3 + 7/5 ((9+8)/18)) - 1/5 = 4/3 + 7/5 . 17/18 - 1/5 = 4/3 + 119/90 - 1/5 = ----mmc(3,5,90) = 120/90 + 119/90 - 18/90 = 239/90 - 18/90 = 221/90
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4/3 + 7/5 (1/2 + 4/9) - 1/5 =
4/3 + 7/5 ((9+8)/18)) - 1/5 =
4/3 + 7/5 . 17/18 - 1/5 =
4/3 + 119/90 - 1/5 = ----mmc(3,5,90) =
120/90 + 119/90 - 18/90 =
239/90 - 18/90 = 221/90