/ ___\
| / x |
asin| / - |
\\/ 3 /
asin(sqrt(x/3))
___
\/ 3
-------------------
_______
___ / x
6*\/ x * / 1 - -
\/ 3
___ / 1 3\
\/ 3 *|----- - -|
| x x|
|1 - - |
\ 3 /
--------------------
_______
___ / x
36*\/ x * / 1 - -
\/ 3
___ / 1 9 2 \
\/ 3 *|-------- + -- - ---------|
| 2 2 / x\|
|/ x\ x x*|1 - -||
||1 - -| \ 3/|
\\ 3/ /
---------------------------------
_______
___ / x
72*\/ x * / 1 - -
\/ 3