function y=func(x)
   y=x;
   y(3)=x(3)*x(3)-x(4)*x(4)-3*x(3)+2;
   y(4)=2*x(3)*x(4)-3*x(4)-1;
   y(5)=3*sin(x(3)+x(4)+2*x(5))+x(5)*x(5)-3;
   y(6)=x(6)*x(6)+3*sin(x(3))-3;
   y(7)=cos(x(7))*x(7)+x(3)*x(3)-x(5)*x(5)+x(4)-2;
   y(8)=x(8)+2*x(3)-x(7)+x(6)+x(3)*x(4)-5;
endfunction