Feynman Academy course: https://feynman-academy-course.vercel.app/#/join
Chapters 1 and 2 are free. Chapter 3 and beyond start with a 7-day trial, then $10/month unless canceled.
Using the Leibniz rule for differentiation under the integral sign and Fubini’s theorem to evaluate a difficult integral.
Link to MathematicsMI's video https://youtu.be/NZSUvtgCkUA
