33+7. 80-5. 58+2-4. 78+20-6

Let's solve each of these math problems:

1. \(33 + 7 = 40\)
2. \(80 - 5 = 75\)
3. \(58 + 2 - 4 = 56\)
4. \(78 + 20 - 6 = 92\)

So, the final answers are:

1. 40
2. 75
3. 56
4. 92