﹙﹣y²﹚³÷y³×﹙﹣y﹚
＝﹙﹣y²﹚^4÷y³
＝y^8÷y³
＝y^5.﹙﹣y﹚和﹙﹣y²﹚怎么可以并合在一起对不起！看错了。 ﹙﹣y²﹚³÷y³×﹙﹣y﹚＝﹣y^6·﹙﹣y﹚÷y³＝y^7÷y³＝y^4.