7.9, due April 1

• Difficult: I was a little confused by the example in the middle of page 231. It says (2 4 3)(1 2 4 3) = (1 4 2 3). No... to me this says 1 goes to 2, and 2 goes to 4 so one goes to 4. Then 2 goes to 4 and 4 goes to 3 so 2 goes to 3. Then 3 goes to 1, and 1 goes to 1, so 3 goes to 1. Then 4 goes to 3, and 3 goes to 2 so 4 goes to 2. Thus I get (4  3 1 2) which is NOT the same answer they got. What am I doing wrong?
• Reflexive: I think I really like this new notation. It totally makes sense to have (2465) mean 2 -> 4 -> 6 ->5. However, I haven't been able to make it work. So... maybe it isn't that great.