4 5*x ------------ _________ / 10 \/ 1 - x
/ 10 \ 3 | 5*x | 5*x *|4 + -------| | 10| \ 1 - x / ------------------ _________ / 10 \/ 1 - x
/ 20 10\ 2 | 75*x 85*x | 5*x *|12 + ---------- + -------| | 2 10| | / 10\ 1 - x | \ \1 - x / / -------------------------------- _________ / 10 \/ 1 - x