Elisp to generate a list of macros in latex

I just write following code in emacs to generate a list of macros in latex:

(mapcar '(lambda (x) (insert (format "\n\\def\\s%s{\\mathscr{%s}}"
                                (string x) (string x))))
                                (concatenate 'list 
                                 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"))

Now press C-x C-E, it will insert following latex codes.

\def\sA{\mathscr{A}}
….
\def\sZ{\mathscr{Z}}