function [c, ceq] = confun(x)
c = [-5*x(1)^2-x(2)^2+200;
    -x(3)^4+2*x(1)^2+250;
    -x(2)*x(3)-x(4)-x(1)*x(5)*x(2)+20;
    8*x(1)*x(4)-4000];

ceq = [x(1)+x(3)^5-2*x(4)*x(5);
x(1)^3+5*x(4)-50;
x(1)+x(2)^4+x(3)-10];