https://witeboard.com/93b46dd0-791a-11ee-b7c1-cb8bf8ab5561
https://www.ocr.org.uk/Images/621261-data-booklet-physics-a-cst992-.pdf
[https://qualifications.pearson.com/content/dam/pdf/A Level/Mathematics/2017/specification-and-sample-assesment/Pearson_Edexcel_A_Level_GCE_in_Mathematics_Formulae_Book.pdf](https://qualifications.pearson.com/content/dam/pdf/A Level/Mathematics/2017/specification-and-sample-assesment/Pearson_Edexcel_A_Level_GCE_in_Mathematics_Formulae_Book.pdf)