can you help me add the following vectors?

can you help me add the following vectors? Im having trouble understanding how to solve and where ive gone wrong. An small explanation would help as well, not just an answer thank you. Also, I have been working on this problem for like a week now. I keep getting different results... The first time I got (112.37, 303.45 deg). the second time I got (112.37, 228.55 deg). the third time I got (-74.405i=34.6959j). and the fourth time I got