Explain EXPLAIN SYNTAX (children 1)
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 4)
     Function sum (children 1)
      ExpressionList (children 1)
       Function plus (children 1)
        ExpressionList (children 2)
         Function multiply (children 1)
          ExpressionList (children 2)
           Identifier n
           Identifier n
         Literal UInt64_1
     Function sum (children 1)
      ExpressionList (children 1)
       Function plus (children 1)
        ExpressionList (children 2)
         Literal UInt64_1
         Function multiply (children 1)
          ExpressionList (children 2)
           Identifier n
           Identifier n
     Function sum (children 1)
      ExpressionList (children 1)
       Function minus (children 1)
        ExpressionList (children 2)
         Function multiply (children 1)
          ExpressionList (children 2)
           Identifier n
           Identifier n
         Literal UInt64_1
     Function sum (children 1)
      ExpressionList (children 1)
       Function minus (children 1)
        ExpressionList (children 2)
         Literal UInt64_1
         Function multiply (children 1)
          ExpressionList (children 2)
           Identifier n
           Identifier n
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       Subquery (children 1)
        SelectWithUnionQuery (children 1)
         ExpressionList (children 1)
          SelectQuery (children 2)
           ExpressionList (children 1)
            Identifier number (alias n)
           TablesInSelectQuery (children 1)
            TablesInSelectQueryElement (children 1)
             TableExpression (children 1)
              Function numbers (children 1)
               ExpressionList (children 1)
                Literal UInt64_10
