11 = (Factorial 4) ÷ (Squareroot 4) - 4 ÷ 4
BTW can use Factorial?
Assuming Factorial (!) can be used...
13 = 4! ÷ Sqrt4 +4 ÷ Sqrt4
15 = 4×4-4÷4
16 = 4+4+4+4
17 = 4×4+4÷4
19 = 4! -4-4÷4
21 = 4! -4+4÷4
27 = 4! + Sqrt4 +4÷4
29 = 4! + 4 + 4 ÷ 4