No problem.
Each half point is worth about 8 cents. So if it's 2 points off market, that's 4 half points. 8 x 4= 32. So if +4 is (-100), +6 is (-132).
132/232= 56.9. So +6 is going to win 56.9% of the time. We'll forget about pushes right now for simplicity.
If you are betting $100
56.9 x 100 = +5690
43.1 times you would lose 110. 43.1 x 110 = 4741
5690-4741= 949 that you would make over 100 games. Divide that by 100 and you have $9.49 in equity for each wager.
If you look up the push percentages for 4, 5, and 6, you get 4.16, 4.37, and 3.48
If you were betting $1000 on each side (which would be a $100 risk)
4.16 times you will push one, and win the other for +1000
3.48 times you will push one, and win the other for +1000
4.37 times you will win both for +2000
88 times you will lose one and win the other for -100
You then need to multiply the push percentages by the amount listed with it
For example, you would multiply 4.16 by 1000= +4160
3.48 x 1000= 3480
4.37 x 2000= 8740
You then add all those together to get 16,380
Then multiply the -100 by 88 for -8,800.
16,380-8,800= 7580.
7580/100= 75.80 in equity on the middle.