program p3;
function g(a, b: real): real;
begin
g := (sqr(a) + sqr(b)) / (sqr(a) + (2 * a * b) + (3 * sqr(b)) + 4);
end;
var
s, t: real;
begin
write('S= ');
readln(s);
write('T= ');
readln(t);
writeln('Otvet= ', g(1.2, s) + g(t, s) - g(2 * s, s * t):0:3);
readln;
end.