[（a+b）²（a-b）²-3b²+3a²]÷（a²-b²）+1求化简,

[（a+b）²（a-b）²-3b²+3a²]÷（a²-b²）+1求化简,
[（a+b）²（a-b）²-3b²+3a²]÷（a²-b²）+1求化简,

[（a+b）²（a-b）²-3b²+3a²]÷（a²-b²）+1求化简,
[（a+b）²（a-b）²-3b²+3a²]÷（a²-b²）+1
=[(a²-b²)²-3(a²-b²)]÷(a²-b²)+1
=a²-b²-3+1
=a²-b²-2