(x^3-1/x^2-x)-(x^3+1/x^2+x)

To simplify the expression, we can start by finding a common denominator for both terms:

(x^3 - 1/x^2) - (x^3 + 1/x^2)

The common denominator is x^2, so we can rewrite the expression as:

(x^3 * x^2 - 1) / x^2 - (x^3 * x^2 + 1) / x^2

Now, we can combine the terms:

(x^5 - 1) / x^2 - (x^5 + 1) / x^2

To subtract the fractions, we need to have a common denominator. In this case, the common denominator is x^2:

((x^5 - 1) - (x^5 + 1)) / x^2

Simplifying further:

(x^5 - 1 - x^5 - 1) / x^2

(-2) / x^2

Therefore, the simplified expression is -2 / x^2.