settings.php

<?php

/**
 * *************************************************************************
 * *                            MathExpression                            **
 * *************************************************************************
 * @package     question                                                  **
 * @subpackage  mathexpression                                            **
 * @name        MathExpression                                            **
 * @copyright   oohoo.biz                                                 **
 * @link        http://oohoo.biz                                          **
 * @author      Raymond Wainman (wainman@ualberta.ca)                     **
 * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later  **
 * *************************************************************************
 * ************************************************************************ */

$settings->add(new admin_setting_configtext('qtype_mathexpression_sageserver',
    get_string('sageserver','qtype_mathexpression'),
    get_string('sageserver_help', 'qtype_mathexpression'), ''));