(Program
  (ExpressionStatements
    (Function
    { (Identifier)
    ->(Identifier) }
    { (Identifier)
    ->(Identifier) }
      (ExpressionStatements
        (Return
        { (MathOperator
            (Identifier)
            (Other "+")
            (Identifier))
        ->(MathOperator
            (Identifier)
            (Other "*")
            (Identifier)) })))))