So posting an equation within a quote or other tag just doesn't work (like this)?

[math] sum_q frac{partial}{partial x_q}vec{psi} = 0[/math]

...but putting it out in the open is the only way to have the tags work?

[math] \sum_q \frac{\partial}{\partial x_q}\vec{\psi} = 0[/math]

Is that correct, or is there a way to have equations display within quotes?

p.p.s.

Thanks for the answer; I never would'a guessed that....