Write an equation that contains several variables, and go immediately to solve them

[roadrunner]

Not sure if this helps but, if you don't mind enclosing your equation in double quotes, this program:

PHP Code:

#pragma mode( separator(.,;) integer(h32) )
EXPORT makevars(is)
BEGIN
 local n,stc,mtvs,sz;
 local fy:={};
 stc:="lname("+is+")";
 mtvs:=CAS(eval(stc));
 sz:=SIZE(mtvs);
 if sz then
  fy:=MAKELIST(string(mtvs(n)),n,1,sz);
 AVars(fy):=0;
 END;
 AVars;
END; 


will create any app variables that do not already exist and return a list.

DelAVars({"y","x"});
makevars("exp (x) * 2sin (y)");

returns: {"x","y"}

-road