This page demonstrates the new MathPlayer 2.1 support for XHTML+MathML pages. It renders properly in Internet Explorer 6 and later with MathPlayer 2.1, and in Firefox 2.0 and later.

Here is a sample equation:

$$g\left(x\right)=\frac{\alpha}{x}+\frac{1}{2}$$You can use this as a template for creating your own interoperable XHTML+MathML pages.