For a listing of mathematical symbol codes, check out Symbol Codes

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For help on RSS See wiki RSS. I think the basic idea is to end the url with: /index.php?title=Special:Recentchanges&feed=rss for recent changes or /index.php?title=Special:Newpages&feed=rss for, Duh, new pages. I would love to have a media wiki or rss expert comment on this.