(x-y)的三次方*(y-x)七次方*(x-y)的四次方同底数幂的乘法,合并

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(x-y)的三次方*(y-x)七次方*(x-y)的四次方同底数幂的乘法,合并(x-y)的三次方*(y-x)七次方*(x-y)的四次方同底数幂的乘法,合并(x-y)的三次方*(y-x)七次方*(x-y)

(x-y)的三次方*(y-x)七次方*(x-y)的四次方同底数幂的乘法,合并
(x-y)的三次方*(y-x)七次方*(x-y)的四次方
同底数幂的乘法,合并

(x-y)的三次方*(y-x)七次方*(x-y)的四次方同底数幂的乘法,合并
(x-y)^3*(y-x)^7*(x-y)^4
=(x-y)^(3+4)*(y-x)^7
=(x-y)^7*(y-x)^7
=[(x-y)(y-x)]^7
=[-(x-y)^2]^7
=-(x-y)^14