Howdy, I think there are an error in the Lyx tutorial (in Lyx menu: help>tutorial) in chapter 4 "Using Math" it says: "(...) Happily, LyX has WYSIWYM support for equations. (...)"and it says: "(...) math commands can be typed in normally, but they will show up in a WYSIWYM fashion (...)"
in the context it should say WYSIWYG instead of WYSIWYM. it is a little detail but may confuse new users. Regards, Asiel Diaz Benitez (Computer Science Student at UCLV University, Cuba)