%
%
%

  function F = pred_prey_eval3(t,X,empty,a,b,c,d,e,f)

  x = X(1);
  y = X(2);
  F(1,1) = a*x - b*x^2 - c*x*y/(x+d);
  F(2,1) = e*y*(1 - f*y/x);