Parse error

er det bare mig der er blind eller kan i finde fejlen her?

Parse error: syntax error, unexpected T_VARIABLE, expecting ')' in /home/virtual/siden.dk/public_html/posting.php on line 1700


Line 1700:
$sql = "UPDATE " . USERS_TABLE . " SET user_points = user_points - (" . $post_data['points_received'] . ' + ' . $post_data['points_attachment_received'] . ' + ' . $post_data['points_poll_received'] . ' + ' . $post_data['points_post_received'] . ' + ' . $post_data['points_topic_received'] . ") WHERE user_id = '" . $post_data['poster_id'] . "'";