function g=funcg(x,bet,alph,b,deld,gam)

if x <= 0
    xb=bet*sqrt(abs(x));
    if abs(xb) <= 30
        g=-sqrt(-x/(2*pi))*exp(x/8)-...
            (bet/alph)*exp(-alph*x)*normcdf(-bet*sqrt(abs(x)))+...
            ((2*bet*bet/alph)-2-x/2)*normcdf(-sqrt(abs(x))/2);       
    else
        aa=log(bet/alph)-alph*x-xb^2/2-log(sqrt(2*pi))-log(xb);
        g=-sqrt(-x/(2*pi))*exp(x/8)-exp(aa)*normcdf(-sqrt(abs(x))/2)+...
            ((2*bet*bet/alph)-2-x/2)*normcdf(-sqrt(abs(x))/2);
    end
    
else
    xb=deld*sqrt(x);
    
    if abs(xb) <= 30;
        
        g=1+(b/sqrt(2*pi))*sqrt(x)*exp(-b*b*x/8)+...
            (b*deld/gam)*exp(gam*x)*normcdf(-deld*sqrt(x))+...
            (2-b*b*x/2-2*deld*deld/gam)*normcdf(-b*sqrt(x)/2);
        
    else
        
        aa=log((b*deld/gam))+gam*x-xb^2/2-log(sqrt(2*pi))-log(xb);
        g=1+(b/sqrt(2*pi))*sqrt(x)*exp(-b*b*x/8)+...
            exp(aa)+(2-b*b*x/2-2*deld*deld/gam)*normcdf(-b*sqrt(x)/2);
    end
end