Question

3n^2 - n/ n^2 - 1 / n^2/ n+1
is the answer 3n-1/n^2-n or 3-n/ n-1

Answer 1

is this what the problem looks like:
(( 3n)^2 - (n/n^2) - 1)/ (n^2 / n+1)?

Answer 2

please repost using brackets, which are essential in this kind of typing.

e.g near the end you have consecutive divisions, that is very unusual
.... - 1 / n^2/ n+1