This is not a "hack" - it's client-side actually.
It uses function() of Resh.edu.ru to automatically solve exercises.

Install

• License: GNU General Public License v3.0 or later
• Weekly downloads: 0
• Average daily users: 4
• Rating: 1/5 of 2 ratings
• Created: 2021-10-31 09:12:45
• Last updated: 2021-11-08 13:15:17
• Homepage: https://github.com/TheAirBlow/HackPack/tree/main/rehack
• Support site and email
• Orig: https://addons.mozilla.org/en-US/firefox/addon/rehack/
• API: {d6d0258a-7376-4a16-9809-3f2825bfcb76}