(a+b/a-b)²×2a-2b/3a+3b÷ab/a²-b²

(a+b/a-b)²×2a-2b/3a+3b÷ab/a²-b²
(a+b/a-b)²×2a-2b/3a+3b÷ab/a²-b²

(a+b/a-b)²×2a-2b/3a+3b÷ab/a²-b²
原式=（a+b）²/（a-b）²×2（a-b）/3（a+b）×（a²-b²）/ab
=（a+b）/（a-b）×2/3×（a+b）（a-b）/ab
=2/3×（a+b）²/ab
=2（a+b）²/3ab