I am looking for a word that implies "without cheating" in any sense. The word has to be a verb, and is a synonym to "solve". If one word is too short, I can also take in two word combinations as well. For example: "To work out" similar to "solve". In a math class, to "work out" means to figure out the problem "without cheating", because looking at the answer book is not "working out" because that does not take "work" in the sense to do. Thank you and have good day!