Please find out by Tuesday which exercises present difficulties for you. Be prepared to discuss what approach you tried, what result you got, and where you got stuck.
This week's homework is exclusively about the techniques of exact equations and integrating factors. I have listed suggested exercises in addition to the required exercises. Remember, it is up to you to practice enough to master the techniques!
Read chapter 2.6 and Mathematica tutorial 6: Mathematica Lesson 6: Some useful advanced techniques.
Section 2.6: Exercises 3, 8, 13, 19, 25.
Section 2.6: Exercises 4, 5, 7, 12, 28, 31.