Question

Using u-sub
Y/(y+1)^3 dy

Answer 1

I'm assuming you have this \[\int\frac{1}{(y+1)^3}\]?

Answer 2

No

Answer 3

\[\int\frac{y}{(y+1)^3}~dy~~?\]
Let \(u=y+1\), then \(y=u-1\) and \(du=dy\).
\[\int\frac{y}{(y+1)^3}~dy=\int\frac{u-1}{u^3}~du\]