(-y + 1)*x + (y^2 - 2*y - 1)
(-y + 1)*x + (y^2 - 2*y - 1)
(-y + 1)*x + (y^2 - 2*y - 1)
(-y + 1)*x + (y^2 - 2*y - 1)
x^4 - 16*x^2
x^2 - 4*x
Total time spent: 4
