To simplify the expression (x^(2/5))^10, we can apply the power of a power rule, which states that we can multiply the exponents when raising a power to another power. Using this rule, we get:
(x^(2/5))^10 = x^(2/5 * 10)
Simplifying the exponent, we get:
x^(2/5 * 10) = x^4
Therefore, the simplified expression is x^4.