program ex_ 1;
uses win crt;
var
x, a, b: real;
begin
writeln('Введите a и b');
read('a, b');
x := ((b * b / (a * a * a – a * b * b)) + 1 / (a + b)) * ((a * a * a * a + 2 * a * a * a * b + a * a * b * b) / (a * a * a * a * b + a * b * b * b * b));
writeln('при a= ', a: 4: 3, 'при b= ', b: 4: 3);
write;
writeln(x: 4: 3);
end.