printf("//to find transfer function using mason gain formula\n syms G1 G2 G3 G4 H1 H2 \n //gains of forward paths\n P1=G1*G2*G3;//forward path1 gain\n P2=-G1*G4;//forward path2 gain\n //gain of individual loops\nL1=-G1*G2*H1;\nL2=-G2*G3*H2;\nL3=-G1*G2*G3;\nL4=G1*G4;\nL5=G4*H2;\n//NO TWO NON TOUCHING LOOPS ARE THERE\nd1=1;\nd2=1;\nd=1-(L1+L2+L3+L4+L5);\nG=(P1*d1+P2*d2)/d;\ntransfer function C/R=G")