Add rational numbers
-3+2
-1
(-8)-(4)
-12
-7*4
-28
-12/-3
4
5+(-1)
4
(12)-(-2)
14
28*-2
-56
36/-3
-12
-8+2
-6
(20)-(3)
-17
-23*-4
92
72/3
24
-3+4
1
(38)-(-28)
66
45*12
540
-159/-3
53
-34+12
-22
(128)-(-243)
371
-172*27
-4644
278/-2
-139