I'm npt a CS major, and I also don't have the slightest idea what that formula is about. Don't even know half of the symbols. Granted, my bachelor's isn't even

I'm npt a CS major, and I also don't have the slightest idea what that formula is about. Don't even know half of the symbols. Granted, my bachelor's isn't even a scientific degree, I'm an ex-addict turned sysadmin recently turned programmer, self-taught entirely. But I'm freaking sad I was a dumb kid who thought math was stupid once and that our school system (Germany) made it so easy to use my talent for language to average out my dare-I-say intentionally bad grades in the subject. It's not even that I was bad at it. What drove me to computers, to code or crafting ridiculous zsh scripts in the first place was formulating my own approach to solving a problem. As much as I sucked at "solve these twenty equations like this", I used to love problems stated in natural language and coming up with a solution. Should've built on that. Anyway, besides the late night regret... Can anyone of you recommend a book for me? Think little to no familiarity with the terminology, many years of only using what math a supermarket or insurance situation entails, eagerness to learn and fascination with the subject. No delusions about becoming a regular mathlete in my early thirties, I just want to fix a lack of knowledge caused by pubescent idiocy. Thanks!