1.5*log(x^2 + 4*x + 8) - 4.0*atan((2*x + 4)/4)
/ x\ / 2 \ - 8*atan|1 + -| + 3*log\8 + x + 4*x/ \ 2/ ------------------------------------- 2
/2 + x\ - 8*atan|-----| + 3*log(8 + x*(4 + x)) \ 2 / -------------------------------------- 2
/ / 2 \ / x\\ -|- 3*log\8 + x + 4*x/ + 8*atan|1 + -|| \ \ 2// ----------------------------------------- 2