A quaestion for DEFUN

[SEMENOV@C71.CANTERBURY.AC.UK]

Dear Chun-Yu Lee.
A solution might be as follows. Define a function:
(defun equation1(eqn); put here the body of your macro EQUATION
(defmacro equation(&body eqm) (equation1 eqm))

Yours sincerely,
Dr Michael Semenov,
Christ Church College,
Canterbury, Kent.