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+//Example 3.22: Reduce expression using k-map
+clc; //clears the window
+clear; //clears all existing variables
+//Mapping the expression//
+disp('f(a,b,c,d) = summation of minterms(0,1,4,5,10,11,14)')
+disp('The function f''(a,b,c,d) = summation of minterms(2,3,6,7,8,9,12,13,15)')
+disp(' a''b'' a''b ab ab'' ')
+disp('c''d'' 1 1 ')
+disp('cd'' 1 1 ')
+disp('cd 1')
+disp('cd'' 1 1')
+disp('The three solutions are given below')
+disp(' g1 = c''d'' + ab + b''d'' + a''cd')
+disp(' g2 = c''d'' + ab + b''d'' + a''b''c')
+disp(' g3 = c''d'' + ab + a''d'' + a''b''c')