2 / 2 5\ x *\-28 + 7*x + 12*x / ----------------------- 28
/ / 5 2 \\ / / 5 2 \\ / / 5 2 \\ / / 5 2 \\ / / 5 2 \\ x*x*\x - CRootOf\12*x + 7*x - 28, 0//*\x - CRootOf\12*x + 7*x - 28, 1//*\x - CRootOf\12*x + 7*x - 28, 2//*\x - CRootOf\12*x + 7*x - 28, 3//*\x - CRootOf\12*x + 7*x - 28, 4//
4 7 2 x 3*x - x + -- + ---- 4 7