(a²-b²)(a²+ab+b)(a²-ab+b²)=（a-b）（a+b）(a²+ab+b)(a²-ab+b²)=[（a-b）（a²+ab+b）][（a+b)(a²-ab+b²)]=（a³ -b³ ）（a³ +b³ ）=a...