LaTeX logo  ((/ˈltɛk/ lay-tek or /ˈlɑːtɛk/ lah-tek rather than latex!) is a powerful markup language for writing complex mathematical equations, formulas, etc. Did you know that ourlocality has it built in?

Activate LaTeX by enabling the option from Settings > Slim Jetpack.

LaTeX is a document preparation system and document markup language. It is widely used for the communication and publication of scientific documents in many fields, including mathematics, physics, computer science, economics, and political science.[2] It also has a prominent role in the preparation and publication of books and articles that contain complex multilingual materials, such as Sanskrit and Arabic, including critical editions …

from wikipedia

Use

$ latex your latex code here $

or

[ latex]your latex code here[ /latex]

to include in your posts and comments, remembering to exclude the spaces between the braces and your latex!

$latex ihbarfrac{partial}{partial t}left|Psi(t)right>=Hleft|Psi(t)right>$

produces

ihbarfrac{partial}{partial t}left|Psi(t)right>=Hleft|Psi(t)right>

There are all sorts of options available.