Dear friend, thank you for your analysis. However, I would say that mathematically, it's incorrect to state that X + Y = XY. We cannot express this case as multiplication rather than addition. As I mentioned, Rt = R1 + R2, which implies Rt = Rx + Ry.

In this context, when I referred to "xyz," I did not mean that X + Y = XYZ. Rather, I meant that the result could be any of "X," "Y," or "Z" depending on the values used.

Thank you for your insights!