x -------------------- _______________ / / x \ / 2*atan|-----| / | ___| \/ \\/ 2 /
x/sqrt(2*atan(x/sqrt(2)))
1 x -------------------- - ------------------------- _______________ / 2\ / / x \ | x | 3/2/ x \ / 2*atan|-----| 4*|1 + --|*atan |-----| / | ___| \ 2 / | ___| \/ \\/ 2 / \\/ 2 /
/ ___ \ | 3*\/ 2 | x*|4*x + -------------| | / ___\| | |x*\/ 2 || | atan|-------|| \ \ 2 // -4 + ----------------------- 2 2 + x ---------------------------- / ___\ / 2\ 3/2|x*\/ 2 | 4*\2 + x /*atan |-------| \ 2 /
/ 2 ___ \ ___ | 15 16*x 18*x*\/ 2 | 9*\/ 2 12*x - x*|-4 + ----------------------- + ------ + ----------------------| + ------------- | / ___\ 2 / ___\| / ___\ | / 2\ 2|x*\/ 2 | 2 + x / 2\ |x*\/ 2 || |x*\/ 2 | | \2 + x /*atan |-------| \2 + x /*atan|-------|| atan|-------| \ \ 2 / \ 2 // \ 2 / ----------------------------------------------------------------------------------------- 2 / ___\ / 2\ 3/2|x*\/ 2 | 4*\2 + x / *atan |-------| \ 2 /