L.H.S=(1/w-1/w^2)^2(2+2/w)(-1/1+w^2) (w^-w)^2(2+2w^2)(-1/-w)=w^4-2w^3+w^2(2(1+w^2)(w^2) =(w-2+w^2)(-2w)(w^2)=(-3)(-2w^3)=6w^3=6=R.H.S