Subtracting Integers

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This isn't much different than adding integers.

13 - (-5) is the same as 13 + 5 = 18

-13 - 5 is the same as -(13 + 5) = -18 because of the distributive law.

and -13 - (-5) is the same as -13 + 5 = 5 - 13 = -8