Evaluate the integral by making the given substitution.
∫
d
x
(
7
x
+
12
)
2
,
u
=
7
x
+
12
\displaystyle \int{\frac{{{\left.{d}{x}\right.}}}{{{\left({7}{x}+{12}\right)}^{{2}}}}},\qquad{u}={7}{x}+{12}
∫
(
7
x
+
12
)
2
d
x
,
u
=
7
x
+
12
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Question 6
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