If you submit your paper to a public class that "saves" submissions, your paper is added to the database. When you later submit it to your actual school, it will flag as 100% plagiarized against yourself.

If you’re willing to spend a small amount (far less than the cost of academic trouble), consider:

Disclaimer: This article is for educational purposes. The author does not condone the use of stolen enrollment credentials. Always follow your institution’s academic integrity policies.