6 + (-5) - (-4) = 5
4 + 6 + 6 + 5 + 5 + 4 + 6 + 5 + 5 + 6 + 5 + 5 + 5 + 3 = 70
7 + 5 + 4 + 5 + 3 + 4 + 6 + 5 + 4 + 5 + 6 + 4 + 7 = 65
6 + 4 + 3 + 4 + 4 + 5 + 4 + 6 + 5 + 4 + 8 + 4 = 57
79
yes
3 + 5 + 9 + 5 + 5 + 5 + 5 + 6 + 4 = 37
102
True
Identity.
true
-6 + 4 + (-5) = -7
5 + 6 + 4 = 15.