How can I get better at mathmatical formulas?

I'd suggest you use the Maths formula sheet for the specific exam board you're studying (the formulas are the same really, it's just that you might get a extra or less depending on your specifications.) Keep this handy when you're practicing questions. Meanwhile, put each formula on a flash card with a worked example on the back and an explanation of its use. Go over these every day. Trust me, this helps a lot. Whenever you have a few minutes to spare, go over them until you've memorised all the formulas and its use. To get better at using them, practice! To excel in Maths, learning the theory isn't enough, you really need to use them often to get the hang of it. Hope that helps, Michael!

Check out, mathsmadefree which has resources to help you 🙂 (they have all the formulas, universal to all exam boards)

You can get better by creating a library for the formulas per topic. For example Differentiation has lot of standard derivatives So by creating a lib for every standard derivatives under differentiation and doing the same for other topics will probably help you get better

Try to write all the formulae of the topic or chapter at one place and memorize them daily by practicing model questions. Also you can stick the formulae sheet to a wall or a place where you can see them daily and memorize them for few minutes...