________ 2 / 2 x \/ 2 - x - ----------- ________ / 2 \/ 2 - x
/ 2 \ | x | x*|-3 + -------| | 2| \ -2 + x / ---------------- ________ / 2 \/ 2 - x
/ 2 \ / 2 \ | x | | x | 3*|1 + ------|*|-1 + -------| | 2| | 2| \ 2 - x / \ -2 + x / ----------------------------- ________ / 2 \/ 2 - x