1 Math::Expr parses mathematical expressions into a tree structure.
2 The expressions may contain integers, real numbers, alphanumeric
3 variable names, alphanumeric function names and most other characters
4 might be used as operators. The operators can consist of multiple
5 characters. The only limitation is that a variable or function
6 name may not start on a digit, and not all chars are accepted in
9 WWW: http://search.cpan.org/dist/Math-Expr/