| Step | Hyp | Ref | Expression | 
						
							| 1 |  | addcl |  | 
						
							| 2 | 1 | anim1i |  | 
						
							| 3 | 2 | 3impa |  | 
						
							| 4 |  | homval |  | 
						
							| 5 | 4 | 3expa |  | 
						
							| 6 | 3 5 | sylan |  | 
						
							| 7 |  | homval |  | 
						
							| 8 | 7 | 3expa |  | 
						
							| 9 | 8 | 3adantl2 |  | 
						
							| 10 |  | homval |  | 
						
							| 11 | 10 | 3expa |  | 
						
							| 12 | 11 | 3adantl1 |  | 
						
							| 13 | 9 12 | oveq12d |  | 
						
							| 14 |  | ffvelcdm |  | 
						
							| 15 |  | ax-hvdistr2 |  | 
						
							| 16 | 14 15 | syl3an3 |  | 
						
							| 17 | 16 | 3exp |  | 
						
							| 18 | 17 | exp4a |  | 
						
							| 19 | 18 | 3imp1 |  | 
						
							| 20 | 13 19 | eqtr4d |  | 
						
							| 21 | 6 20 | eqtr4d |  | 
						
							| 22 |  | homulcl |  | 
						
							| 23 |  | homulcl |  | 
						
							| 24 | 22 23 | anim12i |  | 
						
							| 25 | 24 | 3impdir |  | 
						
							| 26 |  | hosval |  | 
						
							| 27 | 26 | 3expa |  | 
						
							| 28 | 25 27 | sylan |  | 
						
							| 29 | 21 28 | eqtr4d |  | 
						
							| 30 | 29 | ralrimiva |  | 
						
							| 31 |  | homulcl |  | 
						
							| 32 | 1 31 | stoic3 |  | 
						
							| 33 |  | hoaddcl |  | 
						
							| 34 | 22 23 33 | syl2an |  | 
						
							| 35 | 34 | 3impdir |  | 
						
							| 36 |  | hoeq |  | 
						
							| 37 | 32 35 36 | syl2anc |  | 
						
							| 38 | 30 37 | mpbid |  |