@DuncanA I know what's the problem now, I was not typing correctly unapply, that's the bad thing about maple, doesn't let you know when something is unknown.

@DuncanA I know what's the problem now, I was not typing correctly unapply, that's the bad thing about maple, doesn't let you know when something is unknown.

@DuncanA ok here it is the equation

> qm := Kp-sqrt(L^2-(Kp-YKboffset)^2-(Kp-ZKboffset)^2);

and then I use:

> qright := unnaply(qm, q);

but maple does not build up correctly the function

@DuncanA ok here it is the equation

> qm := Kp-sqrt(L^2-(Kp-YKboffset)^2-(Kp-ZKboffset)^2);

and then I use:

> qright := unnaply(qm, q);

but maple does not build up correctly the function

thanks for your help, it works for that simple example but when working with 4 times longer equations then Maple doesn't build up the function, why is that?

Edit: I think the problem is that I'm working with strange names for variables, I can change them from the beggining but later I must replace them, but after I did the operation with the function, how can I replace names of variables in an equation? I must replace names because later I must export to matlab.

thanks for your help, it works for that simple example but when working with 4 times longer equations then Maple doesn't build up the function, why is that?

Edit: I think the problem is that I'm working with strange names for variables, I can change them from the beggining but later I must replace them, but after I did the operation with the function, how can I replace names of variables in an equation? I must replace names because later I must export to matlab.