(Statements
{+(LowPrecedenceOr
  {+(Send
    {+(Identifier)+})+}
  {+(Send
    {+(Identifier)+})+})+}
  (LowPrecedenceAnd
  { (Send
    {-(Identifier)-})
  ->(LowPrecedenceOr
    {+(Send
      {+(Identifier)+})+}
    {+(Send
      {+(Identifier)+})+}) }
    (Send
    { (Identifier)
    ->(Identifier) })))