(b) $(-64)^{\frac{1}{3}}=$

Step 1 ：The question is asking for the cube root of -64. The cube root of a number is a value that, when cubed, gives the original number. In this case, we need to find a number that, when cubed, gives -64.

Step 2 ：The cube root of -64 is approximately -4. However, due to the precision limit of numbers, the result is not exactly -4 but very close to it.

Step 3 ：Final Answer: \(\boxed{-4}\)