Can your browser display Presentation MathML?

Below you should see an equation inlined within some text

some text, some text, a + b 260 + a + b i some text.

This picture shows a possible rendering of it:

Snapshot of formula above

Below is an equation with a radical:

a + b 27

a rendering of which is shown below:

Rendering of example 2

If your browser displays those equations correctly, it is enabled to display Presentation MathML.

MathML inside!