aph boundaries.
</p>

<p>This paragraph contains <s>outdated information</s> as well as current information.</p>

<h4>Heading level 4</h4>
<p>The coordinate of the <var>j</var>th point is (<var>x<sub><var>j</var></sub></var>,
  <var>y<sub><var>j</var></sub></var>). For example, the 10th point has coordinate (<var>x<sub>10</sub></var>,
  <var>y<sub>10</sub></var>).</p>

<p><var>E</var>=<var>m</var><var>c</var><sup>2</sup>f(<var>x</var>, <var>n</var>) =
  log<sub>4</sub><var>x</var><sup><var>n</var></sup></p>