4 + 4 + 4 + 4 + 4 + 4 + 4 / 4 = 7
(4 + 4 + 4 + 4 + 4 + 4 + 4 = 28)
(28 / 4 = 7)
4 x 4! - (4/.4)
4+4(4-4)
101
4 /5
Using four fours, you can get 19 with the following sum: 4! - 4 - (4 / 4) That is, four factorial minus four - (four divided by four) - 24 - 4 - (4 / 4) = 19
44 / 4 + root(4) is one solution. You can find additional solutions in the Wikipedia article "Four fours".
44 + 4/4
(4!/4)4 - 4
Google "Four Fours" and you will find a number of solutions, presented more comprehensively than we can.
(4+4)/4 + 4 =6
-4-4+4/4
(4*4)-(4/4)