atan(3*x)
3*e
------------
2
1 + 9*x
$$\frac{3 e^{\operatorname{atan}{\left(3 x \right)}}}{9 x^{2} + 1}$$
atan(3*x)
9*(1 - 6*x)*e
----------------------
2
/ 2\
\1 + 9*x /
$$\frac{9 \left(1 - 6 x\right) e^{\operatorname{atan}{\left(3 x \right)}}}{\left(9 x^{2} + 1\right)^{2}}$$
/ 2 \
| 1 18*x 72*x | atan(3*x)
27*|-2 + -------- - -------- + --------|*e
| 2 2 2|
\ 1 + 9*x 1 + 9*x 1 + 9*x /
---------------------------------------------------
2
/ 2\
\1 + 9*x /
$$\frac{27 \left(\frac{72 x^{2}}{9 x^{2} + 1} - \frac{18 x}{9 x^{2} + 1} - 2 + \frac{1}{9 x^{2} + 1}\right) e^{\operatorname{atan}{\left(3 x \right)}}}{\left(9 x^{2} + 1\right)^{2}}$$
/ 2 \
| 1 18*x 72*x | atan(3*x)
27*|-2 + -------- - -------- + --------|*e
| 2 2 2|
\ 1 + 9*x 1 + 9*x 1 + 9*x /
---------------------------------------------------
2
/ 2\
\1 + 9*x /
$$\frac{27 \left(\frac{72 x^{2}}{9 x^{2} + 1} - \frac{18 x}{9 x^{2} + 1} - 2 + \frac{1}{9 x^{2} + 1}\right) e^{\operatorname{atan}{\left(3 x \right)}}}{\left(9 x^{2} + 1\right)^{2}}$$