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Mathematics
Problem
Evaluate the indefinite integral
I
4
=
∫
x
2
(
x
2
+
4
)
x
2
+
9
d
x
.
I_4 = \int \frac{x^2}{(x^2+4)\sqrt{x^2+9}}\,dx.
I
4
=
∫
(
x
2
+
4
)
x
2
+
9
x
2
d
x
.
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