How? Why? How do you separate the different branches? It feels like there are two million of them and most seem to exist just for the sake of it, everything above basic artihmetic is absolutely bewildering to me. It's exhausting just looking at it, I search for notations and there are trillions of symbols all with weird as fuck names. It's like people purposely went out of the way to make it feel worthless and unbreachable. All of this despite the fact that there only 7 measurements to the International System of Units. Where the fuck am I meant to start???