Quote Originally Posted by Antonio1986 View Post
Question 1st:
Как мучать(-ся) / замучать(-ся) спрягается because wiktionary gives two options
https://ru.wiktionary.org/wiki/%D0%B...B0%D1%82%D1%8C
https://ru.wiktionary.org/wiki/%D0%B...B8%D1%82%D1%8C
Yes, there are two options. They have no difference in meaning.
мучит is a bit more bookish while мучает is a bit more colloquial.