The value of the expression `( 1+ 1/w) (1+ 1/w^2) + ( 2+ 1/w) (2 + 1/w^2) + ( 3+ 1/w) (3+ 1/w^2) +........+( n+ 1/w) (n+ 1/w^2)`, where w is an imaginary cube root of unity

The value of the expression , (2-w)(2-w^2)+2.(3-w)(3-w^2)+....... ...... +(n-1).(n-w)(n-w^2) , where w is an imaginary cube root of unity is

The value of the expression (1+1/omega)(1+1/omega^(2))+(2+1/omega)(2+1/omega^(2))+(3+1/omega^(2))+…………..+(n+1/omega)(n+1/omega^(2)) , where omega is an imaginary cube root of unity, is

The value of the expression 1.(2- omega)(2- omega^(2)) + 2.(3-omega) (3-omega^(2)) + …+ (n-1)(n- omega)(n- omega^(2)) , where omega is an imaginary cube root of unity is

The value of the expression (1+1/omega)(1+1/omega^(2))+(2+1/omega)(2+1/omega^(2))+(3+1/omega)(3+1/omega^(2))+…………..+(n+1/omega)(n+1/omega^(2)) , where omega is an imaginary cube root of unity, is