I’m a junior and am taking BC this year. I took pre calc last year as a sophomore. So far, the material hasn’t been too bad. We’ve gone through limits, derivatives, optimization, and are starting integrals. What would you guys say the hardest topics of BC are and what is tested most on the AP test? We still have differential equations, applications of definite integrals, improper integrals, sequences, infinite series, and parametrics left.