(1)(106)2; (2)(am)4(m为正整数); (3)-(y3)2; (4)(-x3)3.
例 1 计算:
解:(1)(106)2 = 106×2= 1012;
(2)(am)4 = am×4= a4m;
(3)-(y3)2 =-(y3×2)=-y6;
(4)(-x3)3 = -(x3)3= -(x3×3)=-x9.