八上：积的乘方计算题,

题目

八上：积的乘方计算题,
1.[(x-y^3]^4*[-(y-x)^2]^5*(x-y)
2.(-2x^2y)^3-8(x^2)^2*(-x)^2*(-y)^3
第二题打错了
2.(-2x^2*y)^3-8(x^2)^2*(-x)^2*(-y)^3
还有一题
3.(a^m+b^n-2)* (-2a^m-2b^n-2)^2* (3a^m+3b^n-2)^3* (1/2b^n-2+1/2a^m)^4

答案

1.[(x-y^3]^4*[-(y-x)^2]^5*(x-y)
=-[(x-y^3]^4*(x-y)^11
2.(-2x^2*y)^3-8(x^2)^2*(-x)^2*(-y)^3
=-8x^6*y^3-8x^4*x^2*(-y)^3
=-8x^6*y^3+8x^4*x^2*y^3
=-8x^6*y^3+8x^6*y^3
=0
3.(a^m+b^n-2)* (-2a^m-2b^n-2)^2* (3a^m+3b^n-2)^3* (1/2b^n-2+1/2a^m)^4
=(a^m+b^n-2)* 4*(a^m+b^n+1)^2* (3a^m+3b^n-2)^3* (1/2b^n-2+1/2a^m)^4
题目好杂乱