Выражение: 1)(1/ x-y - 1/ x+y) · x²-y²/ y² 2)(1/ x²+1/ y²+1/ x+y · 2x+2y/ xy) · x²y²/ x²-y²

1)(1/х-у-1/х+у)*((х^2-у^2)/у^2)=(х+у-х+у)/(х-у)(х+у)*((х^2-у^2)/у^2)) = 2у/(х^2-у^2)*((х^2-у^2)/у^2))=2/у;

Х+у-х+у
=×(х-у)(х+у)/у^2=
(х-у)(х+у)
2у
==2/у
у^2

₩₩₩₩₩₩₩
=(1/х^2+1/у^2 +
1×2(х+у)
+)×х^2у^2/х^2-у^2=
(х+у)×ху

=(1/х^2+1/у^2+2/ху)×х^2у^2/х^2-у^2=
у^2+х^2+2ху
= ×х^2у^2/(х-у)(х+у)=
х^2у^2
(х+у)^2
==(х+у)/(х-у)
(х-у)(х+у)