Hello. Quick introduction, I'm 12th grade and in my country we have this end exam in mathematics which I have to pass with +85% so I can fulfill my passion(Computer Science and Engineering). I'm studying hardcore these two years but I missed out a lot from 7th to 10th grade cause I didn't have the passion(I didn't like the teachers) There's two types of the exam. Basic level: Algebra 1,2 + Geometry Advanced level: Basic level + Logarithms, Trigonometry, Derivatives, Limits, Integrals. I've 6 months to get prepared, I'm still not sure what I'll choose. So the question: Can someone suggest me a book or an online course or whatever the user might think that covers High school mathematics? I could Google, I know, but it would be better if someone suggested it(experienced user). Thanks.