3/1*5/3+1 7/5-9/5*7/5 1-7/5*25/21 2/1+4/5*5/4 6/13/1*5/3+17/5-9/5*7/51-7/5*25/212/1+4/5*5/46/1*(5-3/2)8/7*7+8/3

问题描述:

3/1*5/3+1 7/5-9/5*7/5 1-7/5*25/21 2/1+4/5*5/4 6/1
3/1*5/3+1
7/5-9/5*7/5
1-7/5*25/21
2/1+4/5*5/4
6/1*(5-3/2)
8/7*7+8/3