The American Hockey League (AHL) became the major affiliation league for the National Hockey League upon its amalgamation with the International Hockey League[?] in 2001. As of the 2002-03 season, the league had 28 clubs, most of them based in eastern Canada and the United States. The league was created in 1936, and teams compete annually for the Calder Cup[?].
... symbol
<math>\pm \sqrt {b^2-4ac}</math>
in the formula should be understood as "either of those element(s) of the field whose square equals b2 - 4ac". ...