7, 2*2 1/12 - (15 1/5 - 11 1/2)7, 4 1/12 - (75/5 - 11/2)7, 4 1/12 - (15 - 5.5)7, 4 1/12 - 9.57, 4 1/12 - 9 6/107, 4 1/12 - 9 3/67, 4 1/12 - 8 6/127, 4 1/12 - 8 1/27, 4 1/12 - 8 6/127, 4 1/12 - 8-0, 15 1/12
Therefore, the result is approximately -0.84.
7, 2*2 1/12 - (15 1/5 - 11 1/2)
7, 4 1/12 - (75/5 - 11/2)
7, 4 1/12 - (15 - 5.5)
7, 4 1/12 - 9.5
7, 4 1/12 - 9 6/10
7, 4 1/12 - 9 3/6
7, 4 1/12 - 8 6/12
7, 4 1/12 - 8 1/2
7, 4 1/12 - 8 6/12
7, 4 1/12 - 8
-0, 15 1/12
Therefore, the result is approximately -0.84.