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9/8 + {1/7 . [ (-2/7 + 3/7) - (1/9 + 1/2)]} =
9/8 + {1/7 . [ 1/7 - 11/18]} =
9/8 + {1/7 . -59/126} =
9/8 + (-59/882) =
3733/3528
(1/3)³ = 1³/3³ = 1/9
-2/7 + 3/7 = -2+3/7 = 1/7
1/9 + 1/2 =
Denominador común: 18
18 : 9 = 2 . 1 = 2
18 : 2 = 9 . 1 = 9
2 + 9 11
---------- = --------
18 18
1/7 - 11/18 =
Denominador común: 126
126 : 7 = 18 . 1 = 18
126 : 18 = 7 . 11 = 77
18 - 77 -59
------------ = ----------
126 126
1/7 . (-59/126) =
1 . -59 = -59
7 . 126 = 882
-59/882
9/8 + (-59/882) =
Denominador común: 3528.
3528 : 8 = 441 . 9 = 3969
3528 : 882 = 4 . -59 = - 236
3969 + (-236) 3733
------------------ = ------------
3528 3528