testEverything.html

<div>
<div id="S0.SS0.SSS0.Px1">
<h4 class=" ltx_font_bold ltx_title_paragraph">bold text</h4>

</div>
<div id="S0.SS0.SSS0.Px2">
<h4 class=" ltx_font_italic ltx_title_paragraph">italic text</h4>

</div>
<div id="S1">
<h1 class=" ltx_title_section">1section1</h1>

<div id="S1.SS1">
<h2 class=" ltx_title_subsection">1.1subsection2</h2>

<div id="S1.SS1.SSS1">
<h3 class=" ltx_title_subsubsection">1.1.1level3</h3>

</div>
</div>
</div>
<div id="S2">
<h1 class=" ltx_title_section">2level 2</h1>

<div id="S2.SS1">
<h2 class=" ltx_title_subsection">2.1level3</h2>

<div id="S2.SS1.p1">
<pre class=" ltx_font_typewriter">
``ignore''
</pre>
<ul>
<li>
<div id="I1.i1.p1">
bullet1
</div>
</li>
<li>
<div id="I1.i2.p1">
bullet2<ol>
<li>
<div id="I1.I1.i1.p1">
number1
</div>
</li>
<li>
<div id="I1.I1.i2.p1">
number2
</div>
</li>
</ol>
</div>
</li>
</ul>
line one 
<br>line two 
<br><math id="S2.SS1.p1.m1">e^{i\pi}=-1</math><center class="center">centered text</center>
<big>BIG TEXT</big><small>small text</small>
</div>
</div>
</div>
</div>