Yes, I'm looking for a shortcut and there is nothing missing in the problem
The answer is -191500 (used a calculator) but how can you do it without actually cubing each number?
All I can think of (if this is a short cut!):
5^3 9^3 - 5^3 13^3 - 5^3 4^3
= 5^3(9^3 - 13^3 - 4^3)