Indefinite Integration

$\log (1+x)\left[6+9(\log (1+x))-7(\log (1+x))^2\right]+C$

$\log (1+x) x^3+7(\log (1+x))^2+4 \log (1+x)+C$

$12-18 \log (1+x)+15(\log (1+x))^2-9(\log (1+x))^3+C$

$6 \log (1+x)-9(\log (1+x))^2+7(\log (1+x))^3+C$