(Program
  (Assignment
    (Identifier)
    (Plus
      (Identifier)
    { (Integer)
    ->(Integer) }))
  (Assignment
    (Identifier)
    (Minus
      (Identifier)
      (Integer)))
  (Assignment
    (Identifier)
    (Times
      (Identifier)
      (Integer)))
  (Assignment
    (Identifier)
    (DividedBy
      (Identifier)
      (Integer)))
  (Assignment
    (Identifier)
    (Power
      (Identifier)
      (Integer))))