| Step | Hyp | Ref | Expression | 
						
							| 1 |  | ancom |  | 
						
							| 2 | 1 | a1i |  | 
						
							| 3 |  | simp11 |  | 
						
							| 4 |  | simp12 |  | 
						
							| 5 |  | simp13 |  | 
						
							| 6 |  | simp23 |  | 
						
							| 7 |  | simp31 |  | 
						
							| 8 |  | cgrcom |  | 
						
							| 9 | 3 4 5 6 7 8 | syl122anc |  | 
						
							| 10 |  | simp21 |  | 
						
							| 11 |  | simp32 |  | 
						
							| 12 |  | cgrcom |  | 
						
							| 13 | 3 5 10 7 11 12 | syl122anc |  | 
						
							| 14 | 9 13 | anbi12d |  | 
						
							| 15 |  | simp22 |  | 
						
							| 16 |  | simp33 |  | 
						
							| 17 |  | cgrcom |  | 
						
							| 18 | 3 4 15 6 16 17 | syl122anc |  | 
						
							| 19 |  | cgrcom |  | 
						
							| 20 | 3 5 15 7 16 19 | syl122anc |  | 
						
							| 21 | 18 20 | anbi12d |  | 
						
							| 22 | 2 14 21 | 3anbi123d |  | 
						
							| 23 |  | brofs |  | 
						
							| 24 |  | brofs |  | 
						
							| 25 | 3 6 7 11 16 4 5 10 15 24 | syl333anc |  | 
						
							| 26 | 22 23 25 | 3bitr4d |  |