-3-6=9
-7+10=3
-7-5=-12
-20+7=-13
18-14=4
-10+13=3
9-12=-3
-17+23=6
-14-4=-18
-25+25=0
-36-7=-43
27-50=-23
-6+8=2
-4-2=-6
-8+2=-6
-31-2=-33
-15+45=30
24-34=-10
-3-6=9
-7+10=3
-7-5=-12
-20+7=-13
18-14=4
-10+13=3
9-12=-3
-17+23=6
-14-4=-18
-25+25=0
-36-7=-43
27-50=-23
-6+8=2
-4-2=-6
-8+2=-6
-31-2=-33
-15+45=30
24-34=-10