题目内容
2a2·a3÷a4=________.
x8÷(x4·x2)=________;
(x4n÷x2n)·xn=________;
x5÷x÷x3=________;
(a2b)3÷(-a2b)2=________;
2a2·a3÷a4=________;
(x4÷x)2·x=________.