计算:
(1)a24÷[(a2) 3] 4;
(2)( a3·a4) 2÷(a3) 2÷a;
(3)- x12÷(-x4) 3;
(4)( x6÷x4·x2) 2;
(5)( x-y)7÷(y-x)2÷( x-y)3;
(6)
+
+
;
(7)( -2)0-
+
+
·
;
(8) a4m+1÷(-a) 2m+1 (m为正整数).
(1)a24÷[(a2) 3] 4;
(2)( a3·a4) 2÷(a3) 2÷a;
(3)- x12÷(-x4) 3;
(4)( x6÷x4·x2) 2;
(5)( x-y)7÷(y-x)2÷( x-y)3;
(6)



(7)( -2)0-




(8) a4m+1÷(-a) 2m+1 (m为正整数).