There are various technologies that could be used for creating equations on the web. The rendering tools below are supported by Pandoc, allowing the insertion of equations using TeX syntax.
The simplest (backend-wise) option is just storing the equation as an image. This can work, if you don't mind having your website look like something from the '90s. It's also annoying since you have to manually format the equation, export it to an image file, then insert with an
However, despite a web standard, it is only supported by FireFox and Safari. As an additional kick in the teeth, its rendering is regrettably inferior to other options.
This is another option supported by Pandoc, but has one up on MathJax by working automatically. On the downside, it's slower and looks rubbish.
It pains me to admit that MathJax is objectively the best in terms of quality, and is usually fast enough. The script will also render MathML in the page, as well as TeX commands.
If this doesn't render properly, get a better browser: