 
 (defun emacspeak-maths-enter (latex)
   "Send a LaTeX expression to Maths server.
-Tries to guess default based on context."
+Tries to guess default based on context.
+Uses guessed default if user enters an empty string."
   (interactive
    (list
     (progn (emacspeak-maths-guess-input) ;guess based on context


;;}}}
;;{{{ Navigators:

;;; Helper: Guess current math expression from TeX/LaTeX


  (declare (special emacspeak-maths))
  (setf(emacspeak-maths-input emacspeak-maths)
       (cond
        ((eq major-mode 'calc-mode)
         (emacspeak-maths-guess-calc))
        ((and (memq major-mode '(tex-mode plain-tex-mode latex-mode ams-tex-mode))
              (featurep 'texmathp))
         (emacspeak-maths-guess-tex))
