To be honest, it depends on the circumstance.
For instance, say if you wrote it on your hand, and your teacher saw, you could say you were using it to help you study before the test, and never washed it off, by accident.
Perhaps if it was written on the desk, you could say it was the previous student who had sat there before you, etc.
Another example could be; you had it written on a small piece of paper that you held under your desk. You could say that you found it on the ground and were reading it out of boredom, not knowing it had the answers to the quiz on it, how wouldn't you be innocent?
However, if you were caught on Brainly, say that you were, maybe, using it to study the previous night/class and reopened the tab by accident, and if you sat on the tab too long, say you were trying to close it for this exact reason.
Sorry I couldn't give you much more than this.
hope it helps tho!
