Code verification for multiple nonlinear constraints

Hi everyone,

I am using fmincon and I have a couple of nonlinear equality constraints. I wish to know which of the codes below is correct for the constraint.

 function [c,ceq] = const(x)
  c = [];
  ceq(1) = x(1)'*x(1) + x(2)'*x(2) + x(3)'*x(3)+ x(4)'*x(4) + x(5)'*x(5) ...
  +x(6)'*x(6) - 1;
  ceq(2) = x(7)'*x(7) + x(8)'*x(8) + x(9)'*x(9)+ x(8)'*x(10) + ...
    x(11)'*x(11) +x(12)'*x(12) - 1;
 end

OR

 function [c,ceq] = const(x)
 c = [];
 f1 = x(1)'*x(1) + x(2)'*x(2) + x(3)'*x(3)+ x(4)'*x(4) + x(5)'*x(5) ... 
  +x(6)'*x(6) - 1;
 f2 = x(7)'*x(7) + x(8)'*x(8) + x(9)'*x(9)+ x(10)*x(10) + x('11)*x(11) ...
    +x(12)'*x(12) - 1;
 ceq = [f1,f2];
 end

Which of the above codes is the correct way to write the constraints?