| Step | Hyp | Ref | Expression | 
						
							| 1 |  | ltrniotaidval.b |  | 
						
							| 2 |  | ltrniotaidval.l |  | 
						
							| 3 |  | ltrniotaidval.a |  | 
						
							| 4 |  | ltrniotaidval.h |  | 
						
							| 5 |  | ltrniotaidval.t |  | 
						
							| 6 |  | ltrniotaidval.f |  | 
						
							| 7 | 2 3 4 5 6 | ltrniotaval |  | 
						
							| 8 | 7 | 3anidm23 |  | 
						
							| 9 |  | simpl |  | 
						
							| 10 | 2 3 4 5 6 | ltrniotacl |  | 
						
							| 11 | 10 | 3anidm23 |  | 
						
							| 12 |  | simpr |  | 
						
							| 13 | 1 2 3 4 5 | ltrnideq |  | 
						
							| 14 | 9 11 12 13 | syl3anc |  | 
						
							| 15 | 8 14 | mpbird |  |