1) (2,3+5,8)x3 5/7= 9.1x3 5/7= 91/10 x 26/7=169/5
2) (4,9-2,3): 7/9= 26/10 x 9/7
3) 169/5 x 117/35= 9 16/17 x 7=69 10/17
1) (2,3+5,8)x3 5/7= 9.1x3 5/7= 91/10 x 26/7=169/5
2) (4,9-2,3): 7/9= 26/10 x 9/7
3) 169/5 x 117/35= 9 16/17 x 7=69 10/17