17 - 14 • 4 = -39
1) 14 • 4 = 56
2) 17 - 56 = -39
11=10+1, 1ˇ6=1, 1
14=10+4, 4ˇ6=7529536, 6
13=10+3, 3ˇ3=27, 7
1+6+7-8=6
Otvet: 6