/ ___\ / ___\ | 1 I*\/ 3 | | 1 I*\/ 3 | (x - 1/2)*|x + - + -------|*|x + - - -------| \ 4 4 / \ 4 4 /
/ 2\ (-1 + 2*x)*\1 + 2*x + 4*x /