plss help me i need help quick 16 pt

Answer:
x^2
Step-by-step explanation:
Using properties of exponenets, all we have to do for the expression when they have the same base is just add the exponenets together.
Since 4/3 + 2/3 = 6/3 or 2...
(x^4/3)(x^2/3) = x^2