Let the x power of 2 be1= t.

Then the x power of 4 is 1 = t 2.

So the original formula is t 2-t+ 1.

-3≤x≤2, so the range of t is1/4,8.

T 2-t+ 1 is the maximum value of a quadratic function.

So the answer is 3/4, 57