7/3 - 5/12 + 1 1/2 : 2 3/4 - 5/6
( 2 1/6 - 2/3 ) ² - 2 1/5
7/3 - 5/12 + 1 1/2 : 2 3/4 - 5/6 = 28/12 - 5/12 + 3/2 : 11/4 - 10/12 = 23/12 + 3/2 * 4/11 - 10/12 =
23/12 + 6/11 - 10/12 = 13/12 + 6/11 = 143/132 + 72/132 = 215/132 = 1 i 83/132
( 2 1/6 - 2/3 ) ² - 2 1/5 = (2 i 2/12 - 8/12)² - 2 i 1/5 = 1 i 14/12 - 8/12)² - 2 i 1/5 = (1 i 6/12)² - 2 i 1/5 =
(3/2)² - 2 i 1/5 = 9/4 - 2 i 1/5 = 2 i 1/4 - 2 i 1/5 = 2 i 5/20 - 2 i 4/20 = 1/20
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7/3 - 5/12 + 1 1/2 : 2 3/4 - 5/6 = 28/12 - 5/12 + 3/2 : 11/4 - 10/12 = 23/12 + 3/2 * 4/11 - 10/12 =
23/12 + 6/11 - 10/12 = 13/12 + 6/11 = 143/132 + 72/132 = 215/132 = 1 i 83/132
( 2 1/6 - 2/3 ) ² - 2 1/5 = (2 i 2/12 - 8/12)² - 2 i 1/5 = 1 i 14/12 - 8/12)² - 2 i 1/5 = (1 i 6/12)² - 2 i 1/5 =
(3/2)² - 2 i 1/5 = 9/4 - 2 i 1/5 = 2 i 1/4 - 2 i 1/5 = 2 i 5/20 - 2 i 4/20 = 1/20