Now add a third column in the pattern of the constants for Simpson's rule: the first row should have a 1, the second four, then two, alternating between four and two until you reach the last row which should be a 1:
A 
B 
C 

1 
x 
f(x) 
Constants 
2 
2.00 
4.00 
1 
3 
2.75 
7.56 
4 
4 
3.50 
12.25 
2 
5 
4.25 
18.06 
4 
6 
5.00 
25.00 
2 
7 
5.75 
33.06 
4 
8 
6.50 
42.25 
2 
9 
7.25 
52.56 
4 
10 
8.00 
64.00 
1 
Hint: The next to the last row should have a four again. If it doesn't, you have made a mistake somewhere. (Did you remember to use an even n?)
Finally, we're ready to multiply out and add.