Calculus 10th Edition

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