x^4 - x^3 + x^2 - x + 1
x^4 - x^3 - 6*x^2 + x + 1
x^4 - 11*x^2 + 9
x^4 - x^3 + 21*x^2 - 21*x + 101
x^4 - x^3 - 23*x^2 + x + 86
x^4 - x^3 + 11*x^2 + 69*x + 171
x^4 - x^3 + 11*x^2 - 101*x + 171