"During the elections, the different parties try to gather votes."
Translation:Tijdens de verkiezingen proberen de verschillende partijen stemmen te verzamelen.
It doesn't have to be left out, it's optional, you could also say …proberen de verschillende partijen om stemmen te verzamelen.
I included the "om" but it wasn't accepted, so I reported it. I just thought I would ask so I would know quicker, and in the case that it wasn't correct I would know why.