Hello, I am a high school student in the UK who is looking to start studying Calculus from Spivak. My question is as follows: What topics might I need to cover in greater detail before doing so? In terms of work done thus far, I have completed my Mathematics IGCSE (1 year early) and am now working through a Further Maths IGCSE, the syllabus of which can be found here: Further Maths Syllabus. I have also covered logarithms, absolute values, binomial theorem and induction as part of contests and accelerated work schemes. What else might I need before tackling this text?