Select the equivalent expression. \[ \left(\frac{x^{8}}{x^{-2}}\right)^{\frac{2}{15}} \]

Step 1 ：\(\left(x^{8}x^{2}\right)^{\frac{2}{15}}\)

Step 2 ：\(x^{\frac{20}{15}}\)

Step 3 ：\(x^{\frac{4}{3}}\)