Whats a counter example to prover that (A - B) ^ (C - B) = A - (B V C) is false.?

Counterexample for (A - B) ^ (C - B) = A - (B V C)








Key: ^ = and V = or.Whats a counter example to prover that (A - B) ^ (C - B) = A - (B V C) is false.?
A={1,2,3}, B={1,3}, C={2,3}


Left hand side has the element 2 and the right hand side does not.Whats a counter example to prover that (A - B) ^ (C - B) = A - (B V C) is false.?
what does the - mean? is it a conditional?