Just a few quick MathML examples here, stolen from Mozilla's MathML Torture Test page. This is only to demonstrate how you can seamlessly embed MathML XML markup directly within a XHTML document, in a Joomla! article. Note that you must serve your content with a suitable MIME type to just mix it into the document this way, and of course your browser needs to know how to render it.

You might as well forget Internet Explorer for this; it can't even handle some basic XHTML and CSS standards properly, least of all extensions such as MathML. But I believe there is an IE plug-in for MathML somewhere, and there are other tricks you can use (e.g. a special XSLT transform) to help out other browsers.

Opera has some limited support for MathML since 9.5 apparently, but as far as I know, Safari & Chrome are still lacking.

∴ Firefox = King of the Web :P

#	Rendered by TeX (Image)	Rendered by Your Browser (MathML)
1		$$x^2{y}^2$$
2		$${}_{2}F_3$$
3		$$\frac{x+y^2}{k+1}$$
4		$$x+y^{\frac{2}{k+1}}$$
5		$$\frac{a}{b/2}$$
6		$$a_0+\frac{1}{{\displaystyle a_1+\frac{1}{{\displaystyle a_2+\frac{1}{{\displaystyle a_3+\frac{1}{{\displaystyle a_4}}}}}}}}$$
7		$a_0+\frac{1}{a_1+\frac{1}{a_2+\frac{1}{a_3+\frac{1}{a_4}}}}$
8		$$\left(\genfrac{}{}{0ex}{}{n}{k/2}\right)$$
9		$$\left(\genfrac{}{}{0ex}{}{p}{2}\right)x^2{y}^{p-2}-\frac{1}{1-x}\frac{1}{1-x^2}$$
10		$$\sum _{\genfrac{}{}{0ex}{}{0\le i\le m}{0<j<n}}P(i,j)$$
11		$$x^{2y}$$
12		$$\sum _{i=1}^p\sum _{j=1}^q\sum _{k=1}^r{a}_{ij}{b}_{jk}{c}_{ki}$$
13		$$\sqrt{1+\sqrt{1+\sqrt{1+\sqrt{1+\sqrt{1+\sqrt{1+\sqrt{1+x}}}}}}}$$