[mathml] <mrow> <munderover> <mo>∑</mo> <mrow> <mi>n</mi> <mo>=</mo> <mn>0</mn> </mrow> <infinity></infinity> </munderover> <mfrac> <mn>1</mn> <mrow> <mi>n</mi> <mo>!</mo> </mrow> </mfrac> </mrow>[/mathml]
Tada!
You *will* need either FireFox, Opera, a good browser, or a plugin for IE to view the MathML. If you don't have any, get Firefox or something, as IE sucks

NeoThermic