Using LaTeX for equations.

Finally some real equation capability in a language I speak.

The LaTeX alignment examples, via cut and paste, do not work for me (first screenshot). Also, the tagging in the basic math examples do not work properly (second screenshot). Something is missing in the use of tags such as xxx.EN_US.

An alignment example using MathML does work, but the language of choice for me is LaTeX.

Thanks for any help as I explore these new capabilities.