dont forget that complex numbers appeared from solving a contradiction of sqrt(-1)
A equality have to senses: to represent a equivalence that have a infinity of situations
to force some conditions for a situation/form to be indeed a eequivalence (solutions of eq., etc)
A multiple equal that is used in your copybook why cannot be then used in Mathcad ? is not here a delimitation from real situations that softwares do because of their limitations sometime?
In mathematics, an equality is an assignment to a solver.
It is so from algebra rules long established . It is so in
CAS [Computer Algebra System], not peculiar to Mathcad.
Sorry, but can't understand what you are trying to use,
for sure your basic concept is erroneous.
read all messages from this Theme and you ll got about what is talked about here