If x>0x > 0x>0, simplify: x5/3x1/3⋅x−1\frac{x^{5/3}}{x^{1/3}} \cdot x^{-1}x1/3x5/3⋅x−1
x1/3x^{1/3}x1/3
x4/3x^{4/3}x4/3
xxx
x2x^2x2