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(-1)+(-9)
-10
(-11)+(-3)
-14
(-20)+(-30)
-50
-19+(-4)
-23
5+33
38
20+(-5)
15
15+(-15)
0
3+(-23)
-20
(-34)+1
-33
(-11)+15
4
(-50)+40
-10
(-9)+20
11
(-5)+5
0
99+(-99)
0
