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        TEXT@34..46 "  x = y + z\n"
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      BlankLine@48..49 "\n"
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      TEXT@49..65 "Some text after."
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      BlankLine@66..67 "\n"
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      TEXT@67..95 "Here's inline display ..."
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        BlockMathMarker@95..97 "$$"
        TEXT@97..102 "a = b"
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      TEXT@196..212 "End of document."
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