The linked files collate whiteboard shots from classes run in previous years for use as a revision aid. (The quality of the photos is variable – but I hope this is nonetheless useful.)

TT 15 past paper

TT 16 past paper

TT 21 past paper

TT 23 past paper (this file also includes TT22, Q1)

TT 24 past paper: Q1, Q2 (thanks to Jiaming Yu for kindly sharing his notes); Q3, Q4