1
1/71除以（1/8+1/24-7/36-1/72)+(1/8+1/24-7/36-1/72)除以1/72
=1/71除以（9/72+3/72-14/72-1/72)+(9/72+3/72-14/72-1/72)除以1/72
=1/71除以(-3/72)+(-3/72)除以1/72
=1/71*(-72/3)-3
=1/71*(-24)-3
=-3又24/71.
2,
1/71除以（1/8+1/24-7/36-1/72)+(1/8+1/24-7/36-1/72)除以1/72
=1/71除以（9/72+3/72-14/72-1/72)+(1/8）除以1/72+(1/24)除以1/72-(7/36)除以1/72-(1/72)除以1/72
=1/71除以(-3/72)+9+3-14-1
=1/71*(-72/3)-3
=1/71*(-24)-3
=-3又24/71.