class="first">This is an experimental feature. To include a mathematical formula, just type
<!-- $E = mc^2$ --><span id="f1" class="inlineMath"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="upper E equals m c squared">
  <mi>E</mi>
  <mo>=</mo>
  <mi>m</mi>
  <msup>
    <mi>c</mi>
    <mn>2</mn>
  </msup>
</math></span> to get Einstein’s<a xmlns:epub="http://www.idpf.org/2007/ops" class="noteRef" id="xd37e1852src" href="test-ch11.xhtml#xd37e1852" title="Go to note 1." epub:type="noteref">1</a>