（7*11+5*12）/132+1
7/12 = 1- 5/125/11 + 5/11 + 6/11 = 1+5/117/12 + 5/11 + 5/11 + 6/11 = 2+ (5/11 - 5/12) = 2 + 5(1/11 - 1/12) = 2+ 5/132 采纳我的，谢谢
