// example 5.1.B//
clc
//clears the screen//
clear
//clears all existing variables//
disp("we can DUAL the given equation as : ");
disp('X= [(A.B''+C'').D+E''].F' );
disp(' Therefore, SO X'' = [(A''B).C+D''].E+F''' );
disp('this says that output Y=[(A''B).C+D''].E+F'')' );