1、(-y^3)^5/y^3/ y^2+2(-y)^10
问题描述：
1、(-y^3)^5/y^3/ y^2+2(-y)^10
2、(x-y)^7/(y-x)^6+(x+y)^3/(x+y)^2
3、已知X^a=5,x^b=3,求X^(3a-2b)的值
答
1、(-y^3)^5/y^3/ y^2+2(-y)^10
=-y^15/y^5+2y^10
=-y^10+2y^10
=y^10
2、(x-y)^7/(y-x)^6+(x+y)^3/(x+y)^2
=(x-Y)+(x+y)^5
3、已知X^a=5,x^b=3,求X^(3a-2b)的值
(x^a)3+(x^b)^2
=5^3+3^2
=125+9
=134