function MyPower(x: real; n: integer): real;

var

 i: integer;

begin

 result := 1;

 if n < 0 then

   result := 1 / MyPower(x, -n)

 else

   for i := 1 to n do

     result := result * x;

end;

var

 x, y, p: real;

begin

 Write('x, y: ');

 Read(x, y);

 p := (2 * MyPower(x, 5) + 4 * MyPower(x, 30) + 8 * y)  

           / (2 * y + MyPower(y, 15) - 25 * x);

 Write('p = ', p);

end.