Is there a way to reverse for the following ?

Loi,

Even if it is possible, it won't be that easy without understanding how the algebra system works. The key point is that the algebra system will keep on converting your expressions into its internal standard form, which tends to defeat your purpose (but makes it easier for the computer programmer).

Sometimes you can use the keywords to explicitly extract certain parts of the expression, or tell the elgebra system to isolate particular variables, which can help in getting the re-arrangement you want.

The other feature of algebra systems is the potential lexicographic ordering of variable names, where some variabels are taken first. I'm not syure how MathCAD does this when passing the variables across to the MuPad engine.

Philip