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If you're the only post in the topic, you can click on the post number and it should give you the option, iirc. If other people have posted in it, then no, you can't delete it. If you feel there's something problematic you could try reaching out to one of the mods via pm, link to the topic and explain why you want it deleted. If it's not a rules violation they have no obligation to do it, but you might luck out and get someone nice enough to do it as a one time thing.
Don't try to think we can understand each other. For some reason, people think that they can do that. Remember that they can't. Never completely. Never enough.