>energy drinks and caffeine/guarana pills literally don't work on me
>coffee makes me want to take a shit immediately or after 1-2 hours, so I can't drink it before an exam
>weak correlation between the amount of sleep and mental performance during the day; sometimes i'm perfectly sharp after 6-7 hours, and sometimes i'm pothead mode after 9-10 hours
Assuming external conditions are perfect (8-10 hours of sleep, hydrated etc), are there other ways to be sharp and focused during a math exam?
No adderall or meme nootropics that cost 200$ per package