33-70=-37
12-(-9)=12+9=21
0-23=-23
-34-5=-39
-19+38=19
38-42=-4
-27-8=-35
-18+(-12)=-20
-50+25=-25
43+(-43)=0
-17+(-10)=-27
35-50=-15
-16-36=-52
9+(-7)=2
-13-(-3)=-13+3=-10
-24-7=-31
16-(-6)=22
-37+18=-19
-9+(-8)=-17
34-35=-1
-26+14=-12
-15+(-5)=-20
29-33=-4
-6-(-9)=-6+9=9-6=3
17-8=9