5m^4/3(m^1/3*2n^1/8)

Answer 1

remember when multiplying powers of the same base we add the exponents

5m^4/3(m^1/3*2n^1/8)
= 10 m^(4/3) n^(1/8)

Answer 2

Hmmm. I get

10 m^(5/3) n^(1/8)