\Alpha
\backcong
\Beta
\bighat
\Chi
\dag
\ddag
\doubleprime
\Epsilon
\equals
\Eta
\geneuro
\geneuronarrow
\geneuronarrow
\hexagon
\hexagon
\Iota
\Kappa
\largecircle
\largediamond
\largesquare
\largetriangleup
\lcurvearrowse
\medcircle
\medtriangleleft
\medtriangleright
\Mu
\neleft
\neswarrow
\notequiv
\notequiv
\notni
\notsmallin
\Nu
\nupdownline
\nwsearrow
\Omicron
\P
\pentagon
\pentagon
\pounds
\rcurvearrowne
\rcurvearrowse
\Rho
\rightangle
\squaredots
\Tau
\textasciitilde
\textquotedblleft
\textquotedblright
\textquoteleft
\textquoteright
\tripleprime
\udots
\upVdash
\varangle
\varparallel
\Zeta
It comes from mathmagic. The maker of Microsoft Office Word equation.
And the list comes from their site.
http://www.mathmagic.com/support/LaTeX_Symbol_Names_supported_by_MathMagic.txt
But AMS symbols are important for math expression. Could you add those special symbols?
Ok! Thank you very much!:)