[AUCTeX] Moving point between formulas

[Rodolfo Medina]

In Emacs, it is very comfortable jumping from word to word forward and backward
with `M-f' and `M-b' respectively.

Now, I wish something similar with math formulas: having, say, 

     $x = y$ bla bla bla $a + b = c$ bla bla bla,

the possibility to set mark at beginning of `$x = y$' and jump to the end of it
(so to copy and paste the whole formula somewhere else).  It does not work for
me in (La)TeX mode, point never jumps in the right places.

Is it possible with AUCTeX, and how?

Thanks for any help
Rodolfo