Userscripts.org

// ==UserScript==
// @name           WordLinx auto solve security question
// @namespace      http://userscripts.org/users/23652
// @description    Auto solve the security question on wordlinx
// @include        http://wordlinx.com/login.php*
// @copyright      JoeSimmons
// ==/UserScript==

var label = document.evaluate("//label[@for='security_code']", document, null, 9, null).singleNodeValue;

if(label) {
var num1 = parseInt(label.innerHTML.match(/\d+(?= \+ \d+)/));
var num2 = parseInt(label.innerHTML.match(/\d+(?=\?)/));
var solution = num1 + num2;
document.getElementById('security_code').value = solution;
}