Question

Прошуууу,помогитееее

(m+n)(m-n)(m^2-n^2)+2m^2n^2


(x+2)^2×(x-2)^2-x^4+16

Answer 1

(m+n)^2+(m-n)^2/(m^2+n^2)=
(m^2+2mn+n^2+m^2-2mn+n^2)/(m^2+n^2)=
(2m^2+2n^2)/(m^2+n^2)=2