помогите
1 1/3+1/3
2 9/11-1 2/11
8-6 5/7
3 8/17+ 1 7/17
7 - 7/11
4 5/13- 2 2/13
4/7+ 3/7
7/9+2 2/9
1-2/5
3 2/7+ 5 4/7
3/8+3
3-2/7
3/11+7/11
9-6 2/9
13 7/15-7