| Step | Hyp | Ref | Expression | 
						
							| 1 |  | dihelval2.l |  | 
						
							| 2 |  | dihelval2.a |  | 
						
							| 3 |  | dihelval2.h |  | 
						
							| 4 |  | dihelval2.p |  | 
						
							| 5 |  | dihelval2.t |  | 
						
							| 6 |  | dihelval2.e |  | 
						
							| 7 |  | dihelval2.i |  | 
						
							| 8 |  | dihelval2.g |  | 
						
							| 9 |  | dihelval2.f |  | 
						
							| 10 |  | dihelval2.s |  | 
						
							| 11 |  | eqid |  | 
						
							| 12 | 1 2 3 11 7 | dihvalcqat |  | 
						
							| 13 | 12 | eleq2d |  | 
						
							| 14 | 1 2 3 4 5 6 11 8 9 10 | dicopelval2 |  | 
						
							| 15 | 13 14 | bitrd |  |