Answer
$\frac{1}{5}(1+6x)^5+C$
Work Step by Step
let $1+6x=u$
$du=6dx$
$\int(1+6x)^4(6)dx$
$=\int u^4du$
$=\frac{1}{5}u^5+C$
$=\frac{1}{5}(1+6x)^5+C$
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