How do I delete some of my topics?

Currently, I have 5 but 2-3 of them are less regulated & also do not have much traf
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Photo by Succubus Queen with the username @Lucasdu,  October 12, 2019 at 10:02 PM. The post is about the topic Sharesome Support and the text says 'How do I delete some of my topics? 

Currently, I have 5 but 2-3 of them are less regulated & also do not have much traffic. 

After those ones are deleted, can I create new topics (to a total of 5)?'