1.
26+35+44 = 105
105-23-35 = 47
105-47-44 = 14
105-26-14 = 65
105-35-65 = 5
105-44-5 = 56
26 23 56
65 35 5
14 47 44
2. 47+59+71 = 177
177-89-71 = 17
177-17-47 = 113
177-113-59 = 5
177-89-59 = 29
177-71-5 = 101
17 89 71
113 59 5
47 29 101
3. 67+13+31 = 111
111-13-37 = 61
111-67-37 = 7
111-31-7 = 73
111-31-37 = 43
111-67-43 = 1
67 1 43
13 37 61
31 73 7