7+(-3)=
4
-11+(-4)=
-15
6+(-6)=
0
15+(-9)=
6
-13+8=
-5
4+(-10)=
-6
-7+12=
5
-5+(-2)=
-7
-8+10=
2
6+(-9)=
-3
-20+5=
-7+7=
-25-(-50)
-25
150-(-265)=
415
-40-78=
-118
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