One possible way: Make a 10 using five 4s as follows: 4 + 4 + (4 + 4)/4 = 10 Make another two 10s using five 4s in each. Multiply these three 10s.
4+4-(4/4)
4+4+(4-4) = 4
44-4/4
If your playing 4 4s, 4! x 4 + root4 + root 4
The answer is 4! - [(4+4)/4]
Probably 45$
4! - sqrt 4 + 4/4
4!/4 - 4/4 = 5
4!+(4+4!)/4
4 + 4 = 8/4 = 2 + 4 = 6
(4x4)-(4/4) = 15