/ 2 \ / 2 \ \x + x + 1/*\x + x + 2/ - 12
/ 2\ / 2\ -12 + \1 + x + x /*\2 + x + x /
-12.0 + (1.0 + x + x^2)*(2.0 + x + x^2)
-12 + (1 + x*(1 + x))*(2 + x*(1 + x))
/ 2\ (-1 + x)*(2 + x)*\5 + x + x /
4 3 2 -10 + x + 2*x + 3*x + 4*x