MathMLForm

MathMLForm[expr] prints as a MathML form of expr.

MathMLForm gives presentation MathML, although its output can normally be interpreted by Mathematica.

MathMLForm[expr] gives MathML for the TraditionalForm of expr.

MathMLForm[StandardForm[expr]] gives MathML for the StandardForm of expr.

MathMLForm acts as a "wrapper", which affects printing, but not evaluation.

MathMLForm gives special characters using HTML aliases.

See The Mathematica Book: Section 1.11.7 and Section 2.8.1.

See also: HTMLSave, Export, TeXForm.