5
4 2 6*(x - 4) *acot(3*x)
5*(x - 4) *acot (3*x) - --------------------
2
1 + 9*x
$$- \frac{6 \left(x - 4\right)^{5} \operatorname{acot}{\left(3 x \right)}}{9 x^{2} + 1} + 5 \left(x - 4\right)^{4} \operatorname{acot}^{2}{\left(3 x \right)}$$
/ 2 \
3 | 2 30*(-4 + x)*acot(3*x) 9*(-4 + x) *(1 + 6*x*acot(3*x))|
2*(-4 + x) *|10*acot (3*x) - --------------------- + -------------------------------|
| 2 2 |
| 1 + 9*x / 2\ |
\ \1 + 9*x / /
$$2 \left(x - 4\right)^{3} \left(\frac{9 \left(x - 4\right)^{2} \left(6 x \operatorname{acot}{\left(3 x \right)} + 1\right)}{\left(9 x^{2} + 1\right)^{2}} - \frac{30 \left(x - 4\right) \operatorname{acot}{\left(3 x \right)}}{9 x^{2} + 1} + 10 \operatorname{acot}^{2}{\left(3 x \right)}\right)$$
/ / 2 \ \
| 3 | 9*x 36*x *acot(3*x)| |
| 18*(-4 + x) *|-acot(3*x) + -------- + ---------------| |
| | 2 2 | 2 |
2 | 2 60*(-4 + x)*acot(3*x) \ 1 + 9*x 1 + 9*x / 45*(-4 + x) *(1 + 6*x*acot(3*x))|
6*(-4 + x) *|10*acot (3*x) - --------------------- - ------------------------------------------------------ + --------------------------------|
| 2 2 2 |
| 1 + 9*x / 2\ / 2\ |
\ \1 + 9*x / \1 + 9*x / /
$$6 \left(x - 4\right)^{2} \left(- \frac{18 \left(x - 4\right)^{3} \left(\frac{36 x^{2} \operatorname{acot}{\left(3 x \right)}}{9 x^{2} + 1} + \frac{9 x}{9 x^{2} + 1} - \operatorname{acot}{\left(3 x \right)}\right)}{\left(9 x^{2} + 1\right)^{2}} + \frac{45 \left(x - 4\right)^{2} \left(6 x \operatorname{acot}{\left(3 x \right)} + 1\right)}{\left(9 x^{2} + 1\right)^{2}} - \frac{60 \left(x - 4\right) \operatorname{acot}{\left(3 x \right)}}{9 x^{2} + 1} + 10 \operatorname{acot}^{2}{\left(3 x \right)}\right)$$