x^2-16x-1=0
x^2-1=16x
x^3 - 1/x^3 = (x-1/x)(x^2+1/x^2+1) = (x^2-1)/x * ((x^2-1) + (1/x^2-1)+ 3) = 16 * (16x - 16/x + 3)
=256*(x-1/x) + 48 = 256*16 + 48 = 4144太给力了，你的回答完美解决了我的问题！