Remark
Does this mean y = (24)^(1/3) ?
If it does then factor 24 into it's prime factors.
Solve
24 = 2*2*2 * 3
Put the results under the cube root sign.
∛(2 * 2 * 2 * 3)
For every 3 equal factors you get to take 1 outside the root sign. You discard the other 2. You then leave the 3 alone.
2∛3 is your answer.
Another way to do this is to realize that the cube root of 8 = 2
∛(8 * 3) = ∛8 * ∛3 = 2*∛3