x^3 - x^2 - 2*x + 1
x^3 - 3*x - 1
x^3 - 3
x^3 - 3*x - 5
x^3 - 7
x^3 - 21*x - 35
x^3 - 21*x - 28
x^3 - 63
x^3 - 21