/ 0.25\ /x\ |/ 4 \ | atan|-| - log\\x - 16/ / \2/
atan(x/2) - log((x^4 - 16)^0.25)
/ -2.0 -1.0\ | 16 5 / 4\ / 4\ | x*|- --------- + 16.0*x *\-16 + x / - 12.0*x*\-16 + x / | | 2 | | / 2\ | \ \4 + x / / ---------------------------------------------------------------- 4
2 -2.0 -3.0 -1.0 4 16*x 5 / 4\ 9 / 4\ / 4\ - --------- + --------- + 36.0*x *\-16 + x / - 32.0*x *\-16 + x / - 6.0*x*\-16 + x / 2 3 / 2\ / 2\ \4 + x / \4 + x /