Ok but forcing me to show my work was one of those things I hated until I was extremely grateful for it. I didn’t need to show my work to prove my answer was correct in elementary school, but it was a slow drift from “I can do it in my head with ease” to “I need to document my steps so I can check where the error occurred”. Also “it’s not enough to be correct, you need to be correct with evidence” is the reality for people who do math for a living