In this video Dr. Kennedy goes through an actual Free Response Question from the 2018 AP Calculus AB exam. It's a great idea to try the question first, and then watch my explanation. This is a good review exercise and includes:
The Fundamental Theorem of Calculus,
Calculating a definite integral using geometry,
u-substitution,
and Function analysis (increasing/decreasing, concavity, inflection points).

Link to previous AP Calculus AB Free Response Questions and scoring guides: https://apcentral.collegeboard.org/courses/ap-calculus-ab/exam/past-exam-questions

Music: www.bensound.com