I, <xtal-math>, am very well acquainted with matters mathematical.
I provide a web component wrapper around third party math libraries.
For the first one, this may be the world's first web component defined via an iframe. Click here to see it in action. Note that it progressively renders. It is a basic calculator, based off the mostly css-based code-pen.
And not only can the iframe be used to reference the web component, you can open the reference directly as a standalone URL: https://bahrus.github.io/xtal-math/giana-pen.html .
Yes, yes, a JS based version is also available: xtal-math-giana-pen-js.js.