anchor.diff:  ----
   where the arithmetic addition is an operand to the arithmetic multiplication and, hence, results in `20` (rather than `11`).
   
  -=== Left-to-right precedence
  +=== Intra level precedence
   
   Most precedence level include multiple operators.
   
  
positive.code: 
  Such chained expression fall into four categories:
  
  ==== Chaining of unary operators
  Unary operators that allow chaining on the same precedence level are
  
  * https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=UnaryAddOrSubtractExpression[Arithmetic additive inverse]
  
negative.code: The chaining of unary operators has unambiguous operator tree.
  ====
  
  ==== Chaining the same associative operator
  Associative operators that allow chaining are
  
  * https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=MultiplyDivideModuloExpression[Multiplication]
  