:√xy+√x/y-√y /x+√(x/y+y/x+2)=√xy+1/y√xy-1/x√xy+√(x²+y²+2xy)/xy=√xy+1/y√xy-1/x√xy+√(x+y)²/xy=√xy+1/y√xy-1/x√xy+(x+y)/xy√xy=√xy+1/y√xy-1/x√xy+1/y√xy+1/x√xy=√xy+2/y√xy
