One possible solution is: 4.4 + 4 / .4 = 21
21/4 = 5.25
4$4=*^5 then ..... from the 5 you do @ 4 ...... finally 4 * 2 making it 21
(4!/4)4 - 4
4+4(4-4)
4*4*4-(4/4)
(4x4+4)/4
4/4+4/4=2
4! + [(4*4)/4^2]
4 + 4 - (4/4) = 7
To get negative 2 using four fours, you can use the following expression: (4 - 4) / 4 - 4 = -2. This equation breaks down as follows: subtracting 4 from 4 gives 0, then dividing by 4 gives 0, and finally subtracting 4 gives -4.
(4+4)/4 + 4 =6