I'm reading Physics papers, and every time I open a paper, all I see is maths and symbols I never seen before and it's just all too overwhelming! For someone who's been away from maths for a long time due to different careers, how would they ever come to understand this maths? It seems so natural and flows like a language by itself. Where should this person start if they need to start understanding and working with maths like a spoken language? Most difficulty is in imagining what the formulas are trying to say in the first place. Like, what is a partial derivative in english language? what are you doing exactly? Things like that.. What's the best way (not in many years hopefully) to start speaking and understanding the language of Physics Mathematics in a few months?