The Wisconsin Badgers overwhelmed the University of Nebraska-Omaha at the Kohl Center Tuesday night 86-40.   The game stayed even for about two minutes before Wisconsin went on a 37-6 tear to lead 42-13 at halftime.   Ben Brust led the way with 15 points and 10 rebounds, Jarred Berggren added 13 and Ryan Evans scored 10 points with 11 boards.  Wisconsin improves to 6-3 in advance of Saturday's in-state showdown with Marquette in Milwaukee.