DOCUMENT@0..60
  HEADING@0..8
    ATX_HEADING_MARKER@0..1
      ATX_HEADING_MARKER@0..1 "#"
    WHITESPACE@1..2 " "
    HEADING_CONTENT@2..6
      TEXT@2..6 "Math"
    NEWLINE@6..8 "\r\n"
  BLANK_LINE@8..10
    BLANK_LINE@8..10 "\r\n"
  PARAGRAPH@10..25
    DISPLAY_MATH@10..23
      DISPLAY_MATH_MARKER@10..12 "$$"
      TEXT@12..21 "\r\nx = y\r\n"
      DISPLAY_MATH_MARKER@21..23 "$$"
    NEWLINE@23..25 "\r\n"
  BLANK_LINE@25..27
    BLANK_LINE@25..27 "\r\n"
  PARAGRAPH@27..39
    TEXT@27..37 "More text."
    NEWLINE@37..39 "\r\n"
  BLANK_LINE@39..41
    BLANK_LINE@39..41 "\r\n"
  PARAGRAPH@41..60
    DISPLAY_MATH@41..58
      DISPLAY_MATH_MARKER@41..43 "$$"
      TEXT@43..56 "\r\na + b = c\r\n"
      DISPLAY_MATH_MARKER@56..58 "$$"
    NEWLINE@58..60 "\r\n"

