Bracket notation is writing different brackets, surrounding single unit, including for bra vectors and for ket vectors. Unfortunately, I see no such template in OneNote math
What are the keyboard shortcuts for adding emojis in Microsoft Word? - Quora
How to use OneNote Math Features
Is there a keyboard shortcut in Word for typing an arrow symbol? - Super User
Create equations in OneNote using Equation Tools - Microsoft Support
How to type a square root symbol on an iPhone or iPad - Quora
Solve math equations with Math Assistant in OneNote - Microsoft Support
Create Big Brace { Topic in OneNote Mind Map - Office OneNote Gem Add-Ins
How to type math characters like union, subset, etc in OneNote - Microsoft Community
How to insert Equations and Symbols in OneNote
How to type a greater than or equal to sign in Microsoft Word - Quora
Module 2 - e-LIFE Improve your Skills in MS Office 2010 PORTRAIT EN (1).pdf
What are the keyboard shortcuts for adding emojis in Microsoft Word? - Quora
Insert symbols and special characters in Word on a mobile device - Microsoft Support
How to: create and add a OneNote tab to your Microsoft Teams team channel using Power Automate + Graph API – Vesa Nopanen – My Metaverse Day
Geekiest Windows Accessory: the Math Input Panel