/ ____\ / ____\ | 1 \/ 11 | | 1 \/ 11 | (x - 1)*|x + - - ------|*|x + - + ------| \ 2 2 / \ 2 2 /
/ 2\ 5 + z*\-7 + 2*z /
/ 2\ (-1 + z)*\-5 + 2*z + 2*z /