>> a = 1+i

a =

  1.000000000000000 + 1.000000000000000i

>> b = 3+7i

b =

  3.000000000000000 + 7.000000000000000i

>> a+b

ans =

  4.000000000000000 + 8.000000000000000i

>> a-b

ans =

 -2.000000000000000 - 6.000000000000000i

>> a*b

ans =

 -4.000000000000000 +10.000000000000000i

>> a/b

ans =

  0.172413793103448 - 0.068965517241379i

>> -a

ans =

 -1.000000000000000 - 1.000000000000000i

>> a'

ans =

  1.000000000000000 - 1.000000000000000i

>> a^b

ans =

  0.000808197112874 - 0.011556516327187i

>> norm(a)

ans =

   1.414213562373095