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Evaluate each of the following : (a) (...

Evaluate each of the following : (a) `(-30) -: 10` (b) `50 -: (-5)` (c) `(-36) -: (-9)` (d) `(-49) -: (49)` (e) `13 -: [(-2) +1]` (f) `0 -: (-12)` (g) `(-31) -: [(30)+(-1)]` (h) `[(-36) -: 12] -: 3` (i) `[(-6)+5] -:[(-2)+1]`

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