-2
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-2
two negatives makes a positive, meaning you add. i.e. 2 - -2 = 2+2 = 4
Not necessarily, for example: If you subtract 3 from 4, then you get +1. But if you subtract 4 from 3, you get -1. The answer will always be an integer, but you cannot make a general statement about the sign, without knowing more information.
6 - -2 = 8
2-4=-2