Question: How to pick certain part of a formula with interactive components?

Hello

I wanted to create a group of interactive components that, when given an eqaution in a math container of an ellepses (in the form of ((x/A)^2)+((y/B)^2)=1) would pick A and B and give back two formulas of the type

x(t)=A*cos(t)

y(t)=b*sin(t)

So, is there a way to extract A and B from the initial formula?

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