Can anyone currently studying these tell me if they work together and if they are hard or not.
It depends what you want to do after. This would be a good choice if you wanted to economics or politics at university. Politics is generally pretty easy if you are interested in the subject, and maths is not really that hard. As for economics I can't speak on that as I didn't do it. If you want to do maths at uni I would reccomend taking further maths as it is often essential or, at the very least, reccomended.
i think i am more likely to take economics or politics at uni. But is politics or economics completely essay writing or are there any other aspects to it?
Politics is essay writing (25 and 30 marks) whereas i think economics is shorter questions (maybe like 8 marks or 12 marks), but do not take my word for it. If you do edexcel politics it is mostly long essays, but paper 3 has two 12 markers which is the shortest they get.