Is it possible to use any package in a wordpress.com blog?

I see in http://en.support.wordpress.com/latex/ that wordpress uses the packages amsmath, amsfonts and amssymb, but if I want, e.g., to make a diagram with xypic -or to use any other package, is there any way?

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    It's maybe better to ask in wordpress.stackexchange.com – percusse Jan 19 '13 at 12:22
  • Note that there are various ways that LaTeX-like syntax is used in blogs: some do use TeX, others use MathJax. It looks like WordPress.com might use a 'real' TeX system, but I doubt they allow arbitrary packages. You might want to look at QuickLaTeX. – Joseph Wright Jan 19 '13 at 12:55
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    I second @Joseph's suggestion. QuickLaTeX uses a reasonable up-to-date TeX Live which means you have (nearly) every package available that made its way into TL. – cgnieder Jan 19 '13 at 13:10
  • Duplicate of Latex packages in Wordpress – Martin Schröder Jan 20 '13 at 12:15