Jaromir Jagr and the three rookies. It’s not a rock band or a children’s book. It’s the formula the New York Rangers used to deny Martin Brodeur his 500th NHL victory. Jagr scored a power-play goal in the second period, and the rest of the Rangers’ offense against Brodeur in their 4-2 win over the New Jersey Devils on Wednesday night was provided by the young trio of Nigel Dawes, Brandon Dubinsky…