I found my way to this forum eventually but in the FAQ question regarding how to write mathXL or whatever Latex is using, there is a dead link to a thread supposedly explaining what Latex is and how to use it.
I guess it should link to the first sticky post here or this Forum in general. Bit frustrating but I luckily I remembered seeing this forum chapter. Not good for newbs!
Perhaps in a couple of years time when you next decide to breeze in the link might be fixed. And if you take a bit of time to become familiar with the culture of MHF you won't have to read anyone's mind.