17 целых три седьмых--------14 целых
============3 целых 3/7
11 2/7 + 4 3/7 - 6 4/7 = 79/7 + 31/7 - 46/7 = 64/7 = 9 1/7
26 7/19- 13 4/19 + 5 2/19 = 501/19 - 251/19 + 97/19 = 347/19= 18 5/19
44 2/9 + 8 5/9 - 7/9 = 398/9 + 77/9 - 7/9 = 468/9 = 52