/ 2\ acos\3*x /
-6*x ------------- __________ / 4 \/ 1 - 9*x
/ 4 \ | 18*x | -6*|1 + --------| | 4| \ 1 - 9*x / ----------------- __________ / 4 \/ 1 - 9*x
/ 4 \ 3 | 54*x | -108*x *|5 + --------| | 4| \ 1 - 9*x / ---------------------- 3/2 / 4\ \1 - 9*x /