syms A Ga Gb G1 G2 C2 V1 V2 s
%Defining expression
expr = V2 == A*((G1*G2*V1 + C2*G2*V2*s)/(C2^2*s^2+G1*G2 + C2*G1*s + 2*C2*G2*s) - Gb*V2/(Ga+Gb))
%Isolating V2 to LHS
expr = isolate(expr,V2)
%Assuming that V2/V1 can isolated from the expression
%Dividing both sides of the expression by V1 to obtain V2/V1 on the left side
expr = expr/V1
If you want to simplify the RHS, this approach works good enough -
%Get numerator and denominator of RHS in a rational form
[n,d] = numden(rhs(expr))
%Redefine the expression
expr = lhs(expr) == n/d
If you want the coefficient of s^2 in the denominator to be 1, get its coefficient by using coeffs and divide d by the coefficient.
