As a university prof, it's nice to see so much honesty among you. I've heard statistics that as many as 50% of students HAVE cheated at some point. Let it be said, I catch several every single term, and these students regret it DEEPLY. They have to repeat the course, they may be expelled, and they just plain look stupid trying to explain themselves. We've heard all the excuses, and chances are good you might get caught.
The other side, mentioned above, is that if you don't learn the material, others will quickly recognize you as a fraud, and you'll suffer for it.
The temptation to cheat when you're under pressure is great, but remember, working well under pressure is what martial artists learn to do best