anchor.diff:  
   [source, cypher]
   ----
  -RETURN a AS a, (a + SUM(b*c) - MIN(c)) * 2 AS agg
  +RETURN a AS a, (a + SUM(b*c) - MIN(c)) * 2 AS foo
   ----
   
   is effectively equivalent to
  
positive.code: 
  [NOTE]
  ====
  A less artificial example is calculating the total gross of an order as the discounted sum of the net values –– product price multiplied by amount –– of the order's line items in query such as:
  
  [source, cypher]
  ----
  
negative.code: 
  The RETURN clause
  
  .[[Q7]]Q7
  [source, cypher]
  ----
  RETURN a AS a, (b - b) + SUM(c) AS foo
  