Let's simplify the expression first:

3,17² = 3,17 3,17 = 10.0489
1,17² = 1,17 1,17 = 1.3689
6,75² = 6,75 6,75 = 45.5625
3,25² = 3,25 3,25 = 10.5625

Now we can substitute these values into the expression:

(10.0489 - 2 3,17 1,17 + 1.3689) / (45.5625 - 10.5625)

Now let's perform the calculations step by step:

(10.0489 - 2 3,17 1,17 + 1.3689) = 10.0489 - 7.42 + 1.3689 = 4.9978

Next, divide by (45.5625 - 10.5625) = 35

Therefore, the final answer is:

4.9978 / 35 ≈ 0.1428