Earlier, I posted a thread about using Unicode to post e.g. writing y=xⁿ instead of ASCII y=x^n.
There also ways to show a "real" equation, i.e. not as one long line of ASCII or Unicode, see long thread here:
openphotographyforums.com/forums/threads/mathematical-equations-in-opf-posts.26844/page-2
For example, click here: kronometric.org/phot/temp/mathml%20101%20file%20type.mml and the formula with show in a new tab at top left, small text. In HTML there are several ways to show it bigger, centered, etc.
Here is the HTML code:
<?xml version="1.0" encoding="UTF-8"?>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<semantics>
<mrow>
<mrow>
<mrow>
<mo stretchy="false">(</mo>
<mrow>
<mfrac>
<mi>t</mi>
<msup>
<mi>N</mi>
<mn>2</mn>
</msup>
</mfrac>
</mrow>
<mo stretchy="false">)</mo>
</mrow>
<mo stretchy="false">=</mo>
<mfrac>
<mrow>
<mrow>
<mi>L</mi>
<mo stretchy="false">×</mo>
<mi>S</mi>
</mrow>
</mrow>
<mi>K</mi>
</mfrac>
</mrow>
</mrow>
<annotation encoding="StarMath 5.0">( t over N^2 ) = {L times S} over K</annotation>
</semantics>
</math>
