/ ___\ / ___\ | 1 I*\/ 3 | | 1 I*\/ 3 | (x + 1/4)*|x + - - + -------|*|x + - - - -------| \ 8 8 / \ 8 8 /
/ 2\ (1 + 4*x)*\1 - 4*x + 16*x /