actually 1 isn't that far from the truth.
My solution to the problem, don't take notes and pay attention in class. All equations u will ever need will be in text book. I got through the later year, and even earned a PhD, using this method.
I noticed that I was taking noted in my early years in school just to feel secure. Everyone around me was doing it so it had to be right. Right? By end of each semester, I also notice that I haven't opened and read a single note, so why bother? I even found that I did better because I wasn't distracted with writing!