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+syms G1 G2 G3 H1
+
+//shifting summing points to left
+//using accosiative law to exchange the summing points, redcusing minor feedback loop and reducing parallel combination of G3/G1 and 1
+
+a= (G3/G1)+1
+b=G1/(1+G1)
+c=a*b*G2
+Y=c/(1+(c*H1))
+
+disp(Y,"C/R = ") \ No newline at end of file