MathML
MathML
is described on W3C's website
as a lowlevel specification for mathematical and scientific content
on the Web and beyond.
You, apparently, can show equations on your website!
As with all cool (fairly) new web stuff,
we need to know how well supported it is on any web browsers
someone is likely to be using.
Let's display some equations!
$\left(x+2\right)\left(x5\right)={x}^{2}2x15$
This one is fairly easy to do without MathML —
(x+2)(x5) = x^{2}2x15
Let's solve a quadtratic equation...
$x=\frac{b\pm \sqrt{{b}^{2}4ac}}{2a}$
Browser Testing
 Firefox — GNU/Linux

The two equations above render correctly,
but the fonts are a little small.
 Brave Browser — GNU/Linux

Brave does not render the equations in any useful manner.
 Google Chrome — GNU/Linux

Google Chrome does not render the equations in any useful manner.
 Vivaldi — GNU/Linux

Vivaldi does not render the equations in any useful manner.
 SeaMonkey — GNU/Linux

The two equations above render correctly,
but the fonts are a little small.
 GNU Icecat — GNU/Linux

The two equations above render correctly,
but the fonts are a little small.
 Opera — GNU/Linux

Opera does not render the equations in any useful manner.
 Epiphany — GNU/Linux

The two equations above render correctly,
and the font sizes look okay.
 Midori — GNU/Linux

The two equations above render correctly,
and the font sizes look okay.
 Internet Explorer — GNU/Linux and Wine

The two equations above render correctly,
but the fonts are a little small.
 Lynx — GNU/Linux

Hahahaha!
You knew this wouldn't work.
It shows the MathML source code.
It is interesting that the browsers that use the
Gecko
layout engine,
like SeaMonkey, Firefox and Epiphany,
all display the MathML.