Forum:Math syntax not working

When I use the following math syntax this is what it shows up as:

$$ alpha; &beta; &gamma; &delta; &epsilon; &zeta; &eta; &theta; &iota; &kappa; &lambda; &mu; &nu; &xi; &omicron; &pi; &rho; &sigma; &sigmaf; &tau; &upsilon; &phi; &chi; &psi; &omega; &Gamma; &Delta; &Theta; &Lambda; &Xi; &Pi; &Sigma; &Phi; &Psi; &Omega $$

What's wrong?

-- .. Jeff  (Talk!)   (Contribs!)   (Email!)   (Blog!) .. 21:24, September 21, 2010 (UTC)