In mathematics, binomial coefficients are represented as \(\binom{a}{b}\), where \(a\) is the \((a-1)^{\text{th}}\) row, and \(b\) is the \((b-1)^{\text{th}}\) number in that row, counting from the left, acting as an index.
Hockey is a team sport that incorporates balance, endurance, and hand-eye coordination. Choosing the proper hockey equipment is important to protect from injuries or dental damage. Hockey players need to drink plenty of water because the heat and weight of the equipment can cause dehydration.
Pond hockey is a simplified form of ice hockey played on naturally frozen ice. Power hockey is a form of hockey for persons requiring the use of an electric (power) wheelchair in daily life. Ringette is an ice hockey variant that was designed for female players; it uses a straight stick and a rubber ring in place of a puck.