RegEx Stuff
HTML
<span id="ra23"><b>6</b> (3) mi./$</span>
<p></p>
<span id="ra24"><b>6</b> (9) mi./$</span>
<strong></strong>
JavaScript
// Remove parentheses but keep text
var mystring1 = $("#ra23").text().replace(/["'\(\)]/g, "");
$("p").text(mystring1);
// Remove parentheses and text in between
var mystring2 = $("#ra24").text().replace(/ *\([^)]*\) */g, " ");
$("strong").text(mystring2);