I
n
[
]
:
=
I
n
t
e
g
r
a
t
e
A
r
c
T
a
n
2
+
2
x
2
+
2
x
(
1
+
2
x
)
,
{
x
,
0
,
1
}
O
u
t
[
]
=
1
∫
0
A
r
c
T
a
n
2
+
2
x
(
1
+
2
x
)
2
+
2
x
x
1
∫
0
A
r
c
T
a
n
2
+
2
x
(
1
+
2
x
)
2
+
2
x
x
=
5
P
i
^
2
9
6