It is so very simple and quick to get the answer, especially since, IF you need it, you can use the calculator that comes with your computer. However, you appear not to be aware of that and the answer is 16.
It is: (-4)^2 +(-4) -9 = 3 when x is equal to -4
4 x 4 is equal to 16.
4 x 4 x 4 x 4 x 4 x 4 (or 4^6) is equal to 4,096.
If x + 4 is less than or equal to 22, that means that x is less than or equal to 18
2 x 4 x 8 x 10 is equal to 640.
4 x 7 x 5 is equal to 140.
If you mean: x+4 = 38 then x = 34
log3(x)=4 x=3^4 x=81
9 x 4 x 10 = 360
-14
512, or 4 x 4 x 4 x 4 x 2
4² x 4³ = 16 x 64 = 24 + 40 + 360 + 600 = 1,024