Complex sentence: In mathematics, a group is an algebraic structure comprising a set of elements together with an operation that combines any two elements to form a third element satisfying four conditions called the group axioms, namely closure, associativity, identity and invertibility.
Split into simpler sentences: In mathematics, a group is an algebraic structure consisting of a set of elements together with an operation that combines any two elements to form a third element. The operation satisfies four conditions called the group axioms, namely closure, associativity, identity and invertibility.