2 2
1 4*x 864*atan(6*x) 15552*x 124416*x *atan(6*x)
--------- - --------- + ------------- + ------------ - -------------------
2 3 2 3 3
/ 2\ / 2\ / 2\ / 2\ / 2\
\1 + x / \1 + x / \1 + 36*x / \1 + 36*x / \1 + 36*x /
$$- \frac{124416 x^{2} \operatorname{atan}{\left(6 x \right)}}{\left(36 x^{2} + 1\right)^{3}} - \frac{4 x^{2}}{\left(x^{2} + 1\right)^{3}} + \frac{15552 x}{\left(36 x^{2} + 1\right)^{3}} + \frac{864 \operatorname{atan}{\left(6 x \right)}}{\left(36 x^{2} + 1\right)^{2}} + \frac{1}{\left(x^{2} + 1\right)^{2}}$$