2(1)(103)3 =(2)[()3]4=3
(3)[(-6)3]4=(4)(x2)5=
(5)-(a2)7 =(6)-(as)3=
(7)(x3)4·x2 =(8)[(x2)3]7 =
(9)(2a)3= (10)(-5b)3=
(11)(xy2)2= (12)(-2x3)4=
(13)[(x2)3]7(14)[(a-b)m] n
(15)(x3)4·x2 (16)(a4)3-(a3)4
(17)(2b)5=(18)(3x2)3=
(19)(?x2)3=
(21) (?x2yz3)3 =
(23)(?2a2b)3(1
2ab2)2=
(25) [?(2x2)3]2=
(27) (5)199×(-23)199
135
(29)(x?y)2?(x?y)3?(y?x)2?(y?x)3
(31)??32?1
?4ab?3ab???3ab
(33)3x(x2-2x-1)-2x2(x-3)
(35)-6xy(x2-2xy-y2)+3xy(2x2-4xy+y2) 20) (?2ab)4=22) 2(x2)n-(xn)2 24) (?3a3)2?a3?(5a3)3=26)(1)9?(?8)98= (28) 0.299×5101 30)(x?y)2?(x?y)3?(y?x)2?(y?x)3 32) -2x2y(3x2-2x-3)(34) 2a(a2-3a+4)-a(2a2+6a-1) (36)-6xy(x2-2xy-y2)+3xy(2x2-4xy+y2)( (( (( (
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