ReplaceAll[(Sqrt[x y]/(1 + (x + y)^2)^2) (1/2), {x -> (u + v)/2, y -> (-u + v)/2}]ReplaceAll[(Sqrt[x y]/(1 + (x + y)^2)^2) (1/2), {x -> (u + v)/2, y -> (-u + v)/2}]

• Natural Language
• Math Input