Actually, I think I got the last question! Instead, I have a question about 2.31, could you give me a hint on how to start this question? Also, I am confused about the approach presented in the video for 2.33, 2.34, and 2.35 B. For 2.35 b, I am confused about how to multiply conjugation and get the most simplified form that is easy for later calculation. For 2.33 and 2.44, I am confused how you can change (1+1)^n, w^2(1+w)^n, and w^4(1+w^2)^n to 2^n+2cos(...)? Thank you!