/x\ asin|-|*sin(2*x) \3/
asin(x/3)*sin(2*x)
/x\ sin(2*x) 2*asin|-|*cos(2*x) + --------------- \3/ ________ / 2 / x 3* / 1 - -- \/ 9
/x\ 4*cos(2*x) x*sin(2*x) - 4*asin|-|*sin(2*x) + --------------- + -------------- \3/ ________ 3/2 / 2 / 2\ / x | x | 3* / 1 - -- 27*|1 - --| \/ 9 \ 9 /
/ 2 \ | 3*x | |-1 + -------|*sin(2*x) | 2| /x\ 4*sin(2*x) \ -9 + x / 2*x*cos(2*x) - 8*asin|-|*cos(2*x) - ------------- - ----------------------- + ------------- \3/ ________ 3/2 3/2 / 2 / 2\ / 2\ / x | x | | x | / 1 - -- 27*|1 - --| 9*|1 - --| \/ 9 \ 9 / \ 9 /