| Step | Hyp | Ref | Expression | 
						
							| 1 |  | s7rn.a |  | 
						
							| 2 |  | s7rn.b |  | 
						
							| 3 |  | s7rn.c |  | 
						
							| 4 |  | s7rn.d |  | 
						
							| 5 |  | s7rn.e |  | 
						
							| 6 |  | s7rn.f |  | 
						
							| 7 |  | s7rn.g |  | 
						
							| 8 |  | s4s3 |  | 
						
							| 9 | 8 | a1i |  | 
						
							| 10 | 9 | rneqd |  | 
						
							| 11 |  | s4cli |  | 
						
							| 12 |  | s3cli |  | 
						
							| 13 | 11 12 | pm3.2i |  | 
						
							| 14 |  | ccatrn |  | 
						
							| 15 | 13 14 | mp1i |  | 
						
							| 16 |  | df-s4 |  | 
						
							| 17 | 16 | a1i |  | 
						
							| 18 | 17 | rneqd |  | 
						
							| 19 |  | s3cli |  | 
						
							| 20 |  | s1cli |  | 
						
							| 21 | 19 20 | pm3.2i |  | 
						
							| 22 |  | ccatrn |  | 
						
							| 23 | 21 22 | mp1i |  | 
						
							| 24 | 1 2 3 | s3rn |  | 
						
							| 25 |  | s1rn |  | 
						
							| 26 | 4 25 | syl |  | 
						
							| 27 | 24 26 | uneq12d |  | 
						
							| 28 | 18 23 27 | 3eqtrd |  | 
						
							| 29 | 5 6 7 | s3rn |  | 
						
							| 30 | 28 29 | uneq12d |  | 
						
							| 31 | 10 15 30 | 3eqtrd |  |