Las Vegas Sands (LVS) and rival MGM Resorts International (MGM) will announce third-quarter results this coming week, amid possibly heightened expectations. Wynn Resorts (WYNN) and gaming equipment maker Bally Technologies (BYI) trounced earnings estimates last week. MGM is slated to announce results Wednesday before the market opens. Wall Street expects MGM to report a loss of 17 cents a share, worse than last year's 14-cent loss. Revenue is