In order to expand (x3 y4)5, I find it helpful to rewrite
Chapter 14, Problem 14.1.421(choose chapter or problem)
In order to expand (x3 y4)5, I find it helpful to rewrite the expression inside the parentheses as x3 (y4).
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer