20
20 14*x*e
atan(14*x)*e + ----------
2
1 + 196*x
$$\frac{14 x e^{20}}{196 x^{2} + 1} + e^{20} \operatorname{atan}{\left(14 x \right)}$$
/ 2 \
| 196*x | 20
28*|1 - ----------|*e
| 2|
\ 1 + 196*x /
-----------------------
2
1 + 196*x
$$\frac{28 \left(- \frac{196 x^{2}}{196 x^{2} + 1} + 1\right) e^{20}}{196 x^{2} + 1}$$
/ 2 \
| 784*x | 20
5488*x*|-4 + ----------|*e
| 2|
\ 1 + 196*x /
----------------------------
2
/ 2\
\1 + 196*x /
$$\frac{5488 x \left(\frac{784 x^{2}}{196 x^{2} + 1} - 4\right) e^{20}}{\left(196 x^{2} + 1\right)^{2}}$$