-39 minus -26 is -13
Negative 18 minus positive 12 is negative 30.
-4 minus -12 is 8.
-12 minus -6 is -6
Negative 8 minus 12 is negative 20.
-12 * * * * * Wrong! -4 minus -8 = -4 + 8 = +4
21 minus -5 is 26.
negative 24
12 minus -5 is 17.
-14 minus -2 is -12
39 - - 26 = 65
-12 - -36 = 24