/x\ asin|-| \3/ 7 *log(7) --------------- ________ / 2 / x 3* / 1 - -- \/ 9
/x\ asin|-| \3/ / x 27*log(7)\ 7 *|----------- - ---------|*log(7) | 3/2 2 | |/ 2\ -9 + x | || x | | ||1 - --| | \\ 9 / / ----------------------------------------- 27
/x\ asin|-| / 2 2 \ \3/ | 3 x 3*log (7) 243*x*log(7)| 7 *|----------- + ----------- + ----------- + ------------|*log(7) | 3/2 5/2 3/2 2 | |/ 2\ / 2\ / 2\ / 2\ | || x | | x | | x | \-9 + x / | ||1 - --| |1 - --| |1 - --| | \\ 9 / \ 9 / \ 9 / / ------------------------------------------------------------------------ 81