1/42=1/?-1/?

问题描述:

1/42=1/?-1/?
1/132=1/?-1/?
2/35=1/?-1/?

1/42 = 1/6 - 1/7
1/132 = 1/11 - 1/12
2/35 = 1/5 - 1/7
23/132 = 1/11 + 1/12