[x^4-9*x^2+4, \
x^4-x^3-3*x+4, \
x^4-x^3+16*x^2-16*x+61, \
x^4+x^3+15*x^2-17*x+29, \
x^4-x^3-24*x^2+4*x+16, \
x^4+x^3-24*x^2-69*x-49]