________ / 2 /x\ x*\/ 4 - x + 4*asin|-| \2/
x*sqrt(4 - x^2) + 4*asin(x/2)
________ 2 / 2 2 x \/ 4 - x + ------------- - ----------- ________ ________ / 2 / 2 / x \/ 4 - x / 1 - -- \/ 4
/ 2 \ | 1 3 x | x*|------------- - ----------- - -----------| | 3/2 ________ 3/2| | / 2\ / 2 / 2\ | | | x | \/ 4 - x \4 - x / | |2*|1 - --| | \ \ 4 / /
2 4 2 1 3 6*x 3*x 3*x ------------- - ----------- - ----------- - ----------- + ------------- 3/2 ________ 3/2 5/2 5/2 / 2\ / 2 / 2\ / 2\ / 2\ | x | \/ 4 - x \4 - x / \4 - x / | x | 2*|1 - --| 8*|1 - --| \ 4 / \ 4 /