re is no equivalent
for its functionality.  <tt>+</tt>, and <tt>?</tt> are ordinary
characters.</li>
<li>The delimiters for bounds are <tt>\{</tt> and <tt>\}</tt>, with
<tt>{</tt> and <tt>}</tt> by themselves ordinary characters.</li>
<li>The parentheses for nested subexpressions are <tt>\(</tt> and
<tt>\)</tt>, with <tt>(</tt> and <tt>)</tt> by themselves ordinary
characters.</li>
<li><tt>^</tt> is an ordinary character except at the beginning of the
RE or the beginning of a parenthesized subexpression.  S