Let me see if the same kind of latex arrangment which works for wordpress works here too. Here we go:

$latex <= the\ wordpress\ approach\ fails\ here;\ \ 3^2-2^3 = 1$
$3^2 - 2^3 = 1$
$$3^2 - 2^3$$ - double dollar tags do it!


-- unfortunately, no such luck.

Oh, yes! Mathjax helped, finally! I've just have installed it, namely this line:

<script type="text/javascript" src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML">

just before the head-end tag. Similar line works for the wordpress.org blogs (but there is no such option for wordpress.com blogs!--there is no editor option in appearance in Dashboard under the .com environment).

I have completed the mathjax script or rather have added the other one (2014-04-24). On the other hand the wordpress approach with  dollar + latex  does not work here, which is fine; one solution is enough; the formal string latex shows up.

Now, what about Polish letters, and the Polish programmer keyboard? Let's see:

ą  ć  ę  ł  ń  ó  ś  ź  ż
Ą  Ć  Ę  Ł  Ń  Ó  Ś  Ź  Ż

No good. Things are not that simple.

Actually (2014-04-24), the things are that simple if you know about inserting the following line into header:

<meta http-equiv="content-type" content="text/html;charset=utf-8" />

$\LaTeX\ :\ \emptyset\ \forall$