13 - 4 + 12 = 21
13 - 12 + 5 = 6
13 + -12 - 5 = -4 13 + -12 = 1 - 5 = -4
-12
-4 + 12 = 8
-5 + (-4) - 12 - 20 - (-10) + 6 = -25
18 + 12 + 0 - 4 - 10 = 16
8 plus 4 minus 12 divided by 1 is 0.
4 + 9 - 12 = 1
It is: 4/7 minus 5/12 = 13/84
5 - 22 + 4 = -13
4/7 minus 5/12 = 13/84
It also equals 13 12.