Let W = (0, 1, 3}, X = {1, 3, 5), Y = (3, 4} and Z = {(1, 2), (3, 4), (1, 3),(2, 4). Compute (X x Y) - z. For sets W, X and Y, verify that: w x (XU Y) = (W x X) U (W x Y).

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