Express as the product of disjoint cycles: a. (1,2,3)(4,5)(1,6,7,8,9)(1,5) b. (1,2)(1,2,3)(1,2) I now how to do in 2 row permutations, with right to - left. can any one tell me , how to express it without transfer it into 2 row permutations. One more question, How do we find out it's odd or even permutaions. Thank you. I am doing my past exam paper, university doesn't give us answer.