[Maxima] minimal maxima function def to use mfuncall?

[Edwin Woollett]

What is the minimum amount of preparation one
must do in defining a maxima function using :=
to be able to use it with mfuncall?
---------------------------
(%i1) :lisp (mfuncall '$sin  '1.570796)
0.9999999999999466

(%i1) f(x) := x^2$

(%i2) :lisp (mfuncall 'f  '3)
((F SIMP) 3)

(%i2) 
--------------------------
Ted Woollett