We need to solve problem 15, which is a division problem: $(a^2b - ab^2 + a^2b^2) / (-ab)$.

1. Problem Description

We need to solve problem 15, which is a division problem: $(a^2b - ab^2 + a^2b^2) / (-ab)$.

2. Solution Steps

To solve this problem, we will divide each term of the polynomial by $-ab$.

$(a^2b - ab^2 + a^2b^2) / (-ab) = \frac{a^2b}{-ab} - \frac{ab^2}{ab} + \frac{a^2b^2}{-ab}$.

Dividing each term:

$\frac{a^2b}{-ab} = -a$

$\frac{-ab^2}{-ab} = b$

$\frac{a^2b^2}{-ab} = -ab$

So, the final expression is:

$-a + b - ab$

3. Final Answer

$-a + b - ab$