Please write with a few words:

1. What you learn from videos

2. Where the concepts described in the videos hard to understand? Which one did you not understand?

3. Is there anything that you wish were done differently in the videos in order for you to understand better the concepts?

https://www.khanacademy.org/math/integral-calculus/ic-integration/ic-integration-with-trig-identities/v/using-trig-identity-to-use-u-substitution

https://www.khanacademy.org/math/integral-calculus/ic-integration/ic-integration-with-trig-identities/v/integral-of-odd-powered-trig-function-with-u-substitution

https://www.khanacademy.org/math/integral-calculus/ic-integration/ic-integration-with-trig-identities/v/trig-identies-for-trig-integral

https://www.khanacademy.org/math/in-in-grade-12-ncert/xd340c21e718214c5:indefinite-integrals/xd340c21e718214c5:partial-fraction-expansion/v/partial-fraction-expansion-to-integrate