Nikon d3200 lens choice?
I have a nikon d3200 with a 18-55mm and a 55-200mm lens. I was considering the nikon 18-105mm(used). Will it be a good choice or will it be better to buy the 35mm 1.8g(new) and the 50mm 1.8g(new) both.
It is not clear why you want new lenses when you already have lenses that cover that range.
Without understanding what you would use the possible lenses for, it is difficult to say which would be better. Unless the prime lenses have a maximum aperture or resolution that suits a particular need, it is not clear why you would buy them. As for the zoom, unless you frequently need that range of focal lengths without changing lenses, it seems unnecessary.
Sorry that is not a very helpful answer. In my opinion, the lenses you already have are ideal for just about any photography you would want and are well suited to the typical use of a Nikon D3200 camera.
If you want to enhance your photographic capabilities, I would consider a good quality flash gun, a good tripod, a remote trigger and a basic range of filters.
What is your reason for wanting new lenses?
If you want a wider range in a single lens for general purpose use then go for the 18-105mm zoom
If you want faster lenses with better image quality go for the 50 and/or 35mm primes.
If you have no real "need" but just want some new toys to play with (nothing wrong with that!) then the 2 primes will open a new area of photography not available to you now or with the 18-105 zoom - that is shallow depth of field shots. So the best "new toy" would be the 2 primes.
NB the difference between the 35 and the 50 is not huge. As in most areas of photography a significant change is made by halving or doubling. If you want 2 primes I would go 35 f/1.8 and 85mm f/1.8 or a 35 or 50 f/1.8 and a 100mm f/2.8 macro. A macro opens up even more possibilities to play around with.
Based on your options, I can't really give an answer because I don't know what your needs are. Are you're just looking for an upgrade in optical quality? Do you need a large aperture lens like the primes that you've listed? You may want to look at the Sigma 18-35 f/1.8 which might give you the best of both worlds: a decent zoom and a larger aperture.
Your 18-55mm and 55-200mm is more versatile than the 18-105mm lens you are eying. If you need to shoot in lower light conditions, the 35mm f/1.8 would be better with your camera for general shooting as it is normal/standard which has the same angle of view as your eyes. If you need the fast lens for shooting closeup portraits, the 50mm f/1.8 would be better.