2 1/3 : ( 5/8 - 8/3 ) - 2 * 1 3/7 =
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спрочно

1) 5/8 - 8/3 = 15/24 - 64/24 = -49/24 2) 2 1/3 : ( -49/24) = 7/3 * (-24/49) = -8/73) 2 * 1 3/7 = 2 6/74) -8/7 - 2 6/7 = -8/7 - 20/7 = - 28/7 = -4ответ: -4