Subscript in HTML using Mathjax

It is possible to render subscript in mathemetical equation using underscore _ in mathjax. You can use multiple levels of subscript.

<title>Reference Rendering division in HTML </title>
<script type="text/javascript"
  tex2jax: {
    inlineMath: [['$','$']],
    preview: ["[math]"],
    processEscapes: true

/* Mathjax tutorial - Subscript */

A simple equation showing usage of subscript

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$$x_1 +x_2+ x_3 = 43 $$
<br />

You can use curly brackets to render subscript so length  more than 1 character. 
<br /><br />
<br /><br />
You will also have to use curly bracket to render sub subscript. 
<br /><br />
<br />

Notice that x_i_2 in above will render error.

<br /><br />
Subscripts can be combined with superscript as in 
<br /><br />
<br /><br />
Aubscripts can also be applied before a literal as in 
<br /><br />


Try this example here. and see subscript using _ works.


1. Render the following using Mathjax ( Use the above example and make changes into it.)

$x_i^2+y_i^2=z_i^2 $