Question

(1)(x-2y)^6/(2y-x)^3 (2)(-x-y)^6/(x+y)^3 (3)(x-2y)^3*(x-2y)^

Answer 1

(1)(x-2y)^6/(2y-x)^3

=-(x-2y)³

(2)(-x-y)^6/(x+y)^3

=（x+y)^6/(x+y)^3

=(x+y)³

(3)(x-2y)^3*(x-2y)^5/[(2y-x)^2]^3

=(x-2y)^3*(x-2y)^5/(x-2y)^6

=(x-2y)²

(4)x^3n+6/x^3(n+2)

=x^(3n+6-3n-6)

=1