упростить 3у-4/у+1+у/у+1/у/у^2-1+5-2y/y+1

1)y/(y+1):y/(y²-1)=y/(y+1)*(y-1)(y+1)/y=y-1
2)(3y-4)/(y+1) +(y-1) +(5-2y)/(y+1)=(3y-4+5-2y)/(y+1) +(y-1)=(y+1)/(y+1) +(y-1)=
=1+y-1=y

Решение смотри в приложении