[SyntaxNode offset=0, "(", SyntaxNode offset=1, "+ 1 2":
  Datum+Datum0 offset=1, "+ ":
    SyntaxNode offset=1, ""
    SyntaxNode+LexemeDatum0+LexemeDatum offset=1, "+ " (eval,children):
      SyntaxNode+Symbol+Identifier+PeculiarIdentifier offset=1, "+" (eval,children)
      SyntaxNode offset=2, " ":
        SyntaxNode+Whitespace+Zs offset=2, " "
  Datum+Datum0 offset=3, "1 ":
    SyntaxNode offset=3, ""
    SyntaxNode+LexemeDatum0+LexemeDatum offset=3, "1 " (eval,children):
      SyntaxNode+NumTen0+NumTen offset=3, "1" (prefix_ten,complex_ten):
        SyntaxNode+PrefixTen+PrefixTen0 offset=3, "" (radix_ten,exactness):
          SyntaxNode+RadixTen+Exactness+Empty offset=3, ""
          SyntaxNode+RadixTen+Exactness+Empty offset=3, ""
        SyntaxNode+ComplexTen+RealTen+RealTen0 offset=3, "1" (sign,ureal_ten):
          SyntaxNode+RadixTen+Exactness+Empty offset=3, ""
          SyntaxNode+UrealTen+UintegerTen offset=3, "1":
            SyntaxNode+DigitTen+Digit offset=3, "1"
      SyntaxNode offset=4, " ":
        SyntaxNode+Whitespace+Zs offset=4, " "
  Datum+Datum0 offset=5, "2":
    SyntaxNode offset=5, ""
    SyntaxNode+LexemeDatum0+LexemeDatum offset=5, "2" (eval,children):
      SyntaxNode+NumTen0+NumTen offset=5, "2" (prefix_ten,complex_ten):
        SyntaxNode+PrefixTen+PrefixTen0 offset=5, "" (radix_ten,exactness):
          SyntaxNode+RadixTen+Exactness+Empty offset=5, ""
          SyntaxNode+RadixTen+Exactness+Empty offset=5, ""
        SyntaxNode+ComplexTen+RealTen+RealTen0 offset=5, "2" (sign,ureal_ten):
          SyntaxNode+RadixTen+Exactness+Empty offset=5, ""
          SyntaxNode+UrealTen+UintegerTen offset=5, "2":
            SyntaxNode+DigitTen+Digit offset=5, "2"
      SyntaxNode offset=6, "", SyntaxNode offset=6, ")"]