Bob, Kris, Janelle, and Pat are in a study team. Bob, Kris, and Janelle have algebra tiles on their desks. Bob has two x2-tiles, four x-tiles, and seven unit
iles; Kris has one artile
and five unit tiles; and Janelle has ten x-tiles and three
unit tiles. Pat's desk is empty. The team decides to put all of the tiles from the
three desks onto Pat's desk. Write an algebraic expression for the new
collection of tiles on Pat's desk.