annotation 1:
annotation 2: Content MathML\sin x + 5errorerror
annotation 3: Content MathMLerrorannotationerror
annotation-xml 1: Content MathMLapplication/mathml-presentation+xmlerrorerror
annotation-xml 2: Content MathMLMathML-Presentationerrorerror
annotation-xml 3: Content MathMLerrorerror
annotation-xml 4: Content MathMLerrorerror
annotation-xml 5: Content MathMLapplication/xhtml+xmlapplication/xhtml+xml
errorerror
annotation-xml 6: Content MathMLtext/htmltext/html
errorerror
annotation-xml 7: Content MathMLerrorerrorannotation-xmlerror