Question$D = 1 - 2(2-1) + 3(3-1) + 7(7-1) + 9(9-1) + 4(4-1) + 6(6-1) + 1(1-1) + 2(2-1)$

Studdy Solution
Sum all evaluated terms:
$$D = 1 - 2 + 6 + 42 + 72 + 12 + 30 + 0 + 2$$
Calculate the sum:
$$D = 163$$
The value of $D$ is:
$$\boxed{163}$$