所见即所得公式编辑器

Math

we use MathLive web component because it makes writing LaTeX effortless with its virtual keyboard.
This is a centered block of the famous quadratic formula

or You can inline it is called a gate function
MathLive supports over 800 TeX commands. you can view the full list Here.

Graph

we use a self-hosted GeoGebra Applet to provide graphs of functions of 1 or 2 variables.

Sketch

we use Excalidraw for sketching hand-drawn like diagrams.

参考资料

https://matheditor.me/playground