Add Z1=3e^i5π/4 and Z2=3e^-i5π/4

Add Z1= 2eiπ/3 and Z2=5ei2π/3

 Add Z1=12 e^iπ/12 and Z2=12e^-iπ/12

  Add Z1=2 e^i11π/13 and Z2=12e^i11π/13   

 Add z1=√2e^iπ  and z2=√2e^-iπ    

Add Z1=√ 2e^iπ and Z2=√ 2e^-iπ

Add Z1=4e^i7π/2 and Z2=7e^i7π/2  

 Add  Z1=√ 6e^{i5π /2} and Z2=√ 6e^-i5π/2

 Add  Z1=5 e^i3π/5 and Z2=12e^i3π/5

  Add  Z1=8e^i7π/8 and Z2=4e^i7π/8