What do you mean by "multiplied"?Y= ABCD(not) multiplied by (AB+CD)
Look at using DeMorgan's theorems. Check http://www.allaboutcircuits.com/vol_4/chpt_7/index.html and in particular http://www.allaboutcircuits.com/vol_4/chpt_7/8.htmly= ( A[not])B[not] ) + (C[not]+D[not] )+ABCD
by Aaron Carman
by Jake Hertz
by Aaron Carman