TAYLORORIGINAL _ _ _ _ _ _ _ _ _ _ _ _ operator

Recovers the original expression (the one that was expanded) from the Taylor kernel that is given as its argument.

syntax:

examples:

    hugo := taylor(exp(x),x,0,2); 

                  1  2      3
  HUGO := 1 + X + -*X  + O(X )
                  2


    taylororiginal hugo; 

  ***** Taylor kernel doesn't have an original part in TAYLORORIGINAL


    on taylorkeeporiginal; 

    hugo := taylor(exp(x),x,0,2); 

                  1  2      3
  HUGO := 1 + X + -*X  + O(X )
                  2


    taylororiginal hugo; 

   X
  E   

An error is signalled if the argument is not a Taylor kernel or if the original expression was not kept, i.e. if taylorkeeporiginal was set off during expansi on.