__________ / 2 __________ x*\/ 4*x - x / 2 /4 - 2*x\ --------------- - \/ 4*x - x - 2*asin|-------| 2 \ 4 /
____________ ____________ / 2 / 2 / x\ x*\/ - x + 4*x - \/ - x + 4*x + 2*asin|-1 + -| + ----------------- \ 2/ 2
-(-x^2 + 4.0*x)^0.5 - 2.0*asin((4 - 2*x)/4) + 0.5*x*(-x^2 + 4.0*x)^0.5
____________ ____________ / 2 / x\ / 2 - 2*\/ - x + 4*x + 4*asin|-1 + -| + x*\/ - x + 4*x \ 2/ -------------------------------------------------------- 2
/2 - x\ ___________ - 4*asin|-----| + \/ x*(4 - x) *(-2 + x) \ 2 / ---------------------------------------- 2
___________ ___________ / x\ x*\/ x*(4 - x) - \/ x*(4 - x) + 2*asin|-1 + -| + --------------- \ 2/ 2
____________ ____________ / 2 / x\ / 2 - 2*\/ - x + 4*x + 4*asin|-1 + -| + x*\/ - x + 4*x \ 2/ -------------------------------------------------------- 2
____________ ____________ / 2 / 2 / x\ x*\/ - x + 4*x - \/ - x + 4*x + 2*asin|-1 + -| + ----------------- \ 2/ 2