Show algebraically that the following equation is valid A.B.C.D' + (A' + B.C).(A + C'.D') + B.C.D+A'.B.C'= A.B.C.D+A'.C.D' + A.B.D+ A.B.C.D'+B.C.D State which theorem you have used for each step in your work. (Hint: simplify the LHS first, and then simplify the RHS of the equation.)

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