Explain EXPLAIN SYNTAX (children 1)
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 1)
     Function plus (children 1)
      ExpressionList (children 2)
       Function plus (children 1)
        ExpressionList (children 2)
         Function plus (children 1)
          ExpressionList (children 2)
           Function sum (children 1)
            ExpressionList (children 1)
             Function multiply (children 1)
              ExpressionList (children 2)
               Identifier n
               Literal UInt64_2
           Function sum (children 1)
            ExpressionList (children 1)
             Function multiply (children 1)
              ExpressionList (children 2)
               Literal UInt64_2
               Identifier n
         Function sum (children 1)
          ExpressionList (children 1)
           Function divide (children 1)
            ExpressionList (children 2)
             Identifier n
             Literal UInt64_2
       Function sum (children 1)
        ExpressionList (children 1)
         Function divide (children 1)
          ExpressionList (children 2)
           Literal UInt64_1
           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
