Chain ring assistance

HI all. Thanks for responses, wasn't expecting that..... so pics attached. One problem might be in eagerness with my £40 new toolkit started stripping back. Chain been taken off but looked knackered. Rear wheel/cassette looks pretty new and feels ok. Large ring awful but it slipped in middle. Also took shot of BB which I removed and cleaned up. No matter what I have to change those rings. Cheers stu
Crikey, they are worn! They look like shark fins.
 
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