Find the derivative of f(y)=9sin6(y4). Enclose arguments of functions in parentheses. For example, sin(2x). Include a multiplication sign between symbols, and so to enter this as sin(2x) If you want to write a power of a trigonometric function, remember that writing sin(x) to the fourth power as sin4(x) is just a shorthand method. To be mathematically correct, you should write that as (sin(x))4 - which is what Mobius expects. f(y)=