Which of the following are equivalent to x2/3x^{2/3}x2/3? (Select all that apply)
x23\sqrt[3]{x^2}3x2
(x1/3)2(x^{1/3})^2(x1/3)2
(x2)1/3(x^2)^{1/3}(x2)1/3
x2/3\sqrt{x^{2/3}}x2/3