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Add and Subtract Integers

Add and subtract the integers.
AB
-20 + 16-4
-3 + -8-11
15 - (-4)19
-11 - 7-18
-6 - (-6)0
-6 - 6-12
14 + -59
-13 + -1-14
2 + -9-7
15 - (-8)23

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