Math Symbols In the codes below remove the space after the & to make them work (and also remove the quotes " ").

"x& sup3;" --> x cubed
"x& sup2;" --> x squared
"& le;" --> less than or equal to
"& ge;" --> greater than or equal to
"& gt;" --> greater than
"& lt;" --> less than
"& sube;" --> subset of
"& int;" --> integral sign
"& sum;" --> uppercase Sigma notation for sum
"& infin;" --> infinity
"& rArr;" --> implies
"& hArr;" --> if and only if
"& forall;" --> for all
"& exist;" --> there exists
"& isin;" --> membership relation
"& lowast;" --> *
"& there4;" --> therefore
"& sim;" --> similar to
"& deg;" --> degrees (as in 45 degrees)
"& plusmn;" --> plus or minus

Greek letters: simply use their normal names as in "& alpha;"

"& copy;" --> copyright

More code references: --- http://tinyurl.com/ffl5g --- http://tinyurl.com/yrnyuz