To simplify this expression, we first expand the terms within the parentheses:

(a-1)^2 = a^2 - 2a + 1

Next, we simplify the expression (1/a^2 - 2a + 1 + 1/a^2 - 1):

1/a^2 + 1/a^2 = 2/a^2

-2a - 1 = -2a - 1

Therefore, the expression simplifies to:

(a^2 - 2a + 1)(2/a^2 - 2a - 1) + 2/a + 1

Expanding the terms:

((2a^2 - 4a + 2) / a^2 - (4a^3 - 8a^2 + 4a) - a^2 + 2a + 1

Now, simplify further:

((2a^2 - 4a + 2) / a^2 - 4a^3 + 8a^2 - 4a - a^2 + 2a + 1

Collecting like terms:

(2 + 2) / a^2 - 3a^2 + 6a + 1

4 / a^2 - 3a^2 + 6a + 1

Therefore, the simplified expression is:

4 / a^2 - 3a^2 + 6a + 1.