If written as , then it means the derivative of the 4th order (the parentheses are important).
I'm reading a problem in my book and they are going over the solution to a problem: If f(x) = 1/x, then f^4 (x) = 24/x^5.... How the heck did they get that? If I take the function to the 4th power, I get 1/(x^4)... Am I not mistaken?