53:  How do I execute a piece of Emacs Lisp code?
  
  There are a number of ways to execute (called "evaluate") an Emacs Lisp
  "form":
  
  * If you want it evaluated every time you run Emacs, put it in a file
    named `.emacs' in your home directory.
  
  * You can type the form in the *scratch* buffer, and then type LFD (or
    C-j) after it.  The result of evaluating the form will be inserted in
    the buffer.
  
  * In Emacs-Lisp mode, typing M-C-x evaluates a top-level form before or
    around point.
  
  * Typing "C-x C-e" in any buffer evaluates the Lisp form immediately
    before point and prints its value in the echo area.
  
  * Typing M-ESC or M-x eval-expression allows you to type a Lisp form in
    the minibuffer which will be evaluated.
  
  * You can use M-x load-file to have Emacs evaluate all the Lisp forms in
    a file.  (To do this from Lisp use the function `load' instead.)
  
  These functions are also used for evaluating Lisp forms:
  
    load-library, eval-region, eval-current-buffer, require, autoload