Ответ Автор - PrЯnicheg 4/у-2/ -(5-у) + 2у+10/ (5-у)(5+у)=4*(5-у)(5+у) + 2у(5+у) + у(2у+10)/у(5-у)(5+у)=100-4У²+ 10у+2у²+ 2у²+10у / у(5-у)(5+у)=20у+100/у(5-У)(5+у)=20(у-5)/у(5-у)(5+у)=-20/у(5+у)