Simple operation: (1 and 7 / 9) ^ 11 * (9 / 16) ^ 11 * (- 1) ^ 11 =? Before nine, thank you!

1 and 7 / 9 can be written as 16 / 9, (16 / 9) ^ 11 * (9 / 16) ^ 11 = 1, so this problem is reduced to (- 1) ^ 11 = - 1