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diff --git a/3827/CH2/EX2.2/EX2_2.sce b/3827/CH2/EX2.2/EX2_2.sce
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+//EX2_2 Simplify Z = [A + B'C + D +EF][A + B'C + (D + EF)']
+
+//clears the screen
+clc
+
+//clears already existing variables
+clear
+
+disp('Z = [A + B''C + D + EF][A + B''C + (D + E''F)]')
+disp('Let X = A + B''C')
+disp('and Y = D + EF     Y'' = (D + EF)''')
+disp('Z = [X + Y][X + Y'']')
+//By uniting theorem i.e. (X + Y)(X + Y') = X
+disp('Z = X ')
+disp('Z = A + B''C')