Valfarly chanced upon wikipedia and thought "that'll never work"... but after using it a few times, he eventually got sufficently annoyed by a typo to do something about it and on 15th March 2004 hit edit. From there it was a slippery slope to writing articles for things he found no-one else had written about and adding tidbits, factoids and other nuggets of information to previously covered topics. Finds himself correcting spelling and grammar far too often!
When using math in an article, there are two different types of markup that one can use. It is important to be consistent throughout an article and use the same type of markup. If a formula appears all on the same line, it would be better to use HTML than LaTeX, because L∞ looks better in line than does; however it's generally a bad idea to attempt to render in HTML.