| Step | Hyp | Ref
| Expression |
| 1 | | nncdiv3 6278 |
. 2
 Nn  Nn           1c      2c   |
| 2 | | id 19 |
. . . . . . 7
 Nn Nn  |
| 3 | | nntccl 6171 |
. . . . . . 7
 Nn Tc Nn  |
| 4 | | nnc3n3p1 6279 |
. . . . . . 7
  Nn Tc Nn    
  Tc Tc 
Tc 
1c  |
| 5 | 2, 3, 4 | syl2anc 642 |
. . . . . 6
 Nn    
  Tc Tc 
Tc 
1c  |
| 6 | | nncaddccl 4420 |
. . . . . . . . . . . 12
  Nn Nn   Nn  |
| 7 | 6 | anidms 626 |
. . . . . . . . . . 11
 Nn  
Nn  |
| 8 | | nnnc 6147 |
. . . . . . . . . . 11
   Nn  
NC  |
| 9 | 7, 8 | syl 15 |
. . . . . . . . . 10
 Nn  
NC  |
| 10 | | nnnc 6147 |
. . . . . . . . . 10
 Nn NC  |
| 11 | | tcdi 6165 |
. . . . . . . . . 10
   
NC
NC Tc     Tc   Tc    |
| 12 | 9, 10, 11 | syl2anc 642 |
. . . . . . . . 9
 Nn Tc     Tc   Tc    |
| 13 | | tcdi 6165 |
. . . . . . . . . . 11
  NC NC Tc 

Tc Tc    |
| 14 | 10, 10, 13 | syl2anc 642 |
. . . . . . . . . 10
 Nn Tc   Tc Tc    |
| 15 | 14 | addceq1d 4390 |
. . . . . . . . 9
 Nn Tc   Tc   Tc Tc  Tc    |
| 16 | 12, 15 | eqtrd 2385 |
. . . . . . . 8
 Nn Tc      Tc Tc  Tc    |
| 17 | 16 | addceq1d 4390 |
. . . . . . 7
 Nn Tc     1c   Tc Tc  Tc  1c  |
| 18 | 17 | eqeq2d 2364 |
. . . . . 6
 Nn     
Tc     1c       Tc Tc  Tc  1c   |
| 19 | 5, 18 | mtbird 292 |
. . . . 5
 Nn    
Tc     1c  |
| 20 | | id 19 |
. . . . . . 7
           |
| 21 | | tceq 6159 |
. . . . . . . 8
     Tc Tc       |
| 22 | 21 | addceq1d 4390 |
. . . . . . 7
     Tc 1c Tc     1c  |
| 23 | 20, 22 | eqeq12d 2367 |
. . . . . 6
      Tc 1c     Tc     1c   |
| 24 | 23 | notbid 285 |
. . . . 5
     
Tc 1c    
Tc     1c   |
| 25 | 19, 24 | syl5ibrcom 213 |
. . . 4
 Nn      Tc 1c   |
| 26 | | nncaddccl 4420 |
. . . . . . . . . . . 12
   
Nn
Nn     Nn  |
| 27 | 7, 2, 26 | syl2anc 642 |
. . . . . . . . . . 11
 Nn   

Nn  |
| 28 | | nnnc 6147 |
. . . . . . . . . . 11
     Nn  
  NC  |
| 29 | 27, 28 | syl 15 |
. . . . . . . . . 10
 Nn   

NC  |
| 30 | | 1cnc 6140 |
. . . . . . . . . 10
1c
NC |
| 31 | | tcdi 6165 |
. . . . . . . . . 10
    

NC 1c NC Tc      1c
Tc     Tc 1c  |
| 32 | 29, 30, 31 | sylancl 643 |
. . . . . . . . 9
 Nn Tc      1c
Tc     Tc 1c  |
| 33 | | tc1c 6166 |
. . . . . . . . . . 11
Tc 1c 1c |
| 34 | 33 | a1i 10 |
. . . . . . . . . 10
 Nn Tc
1c
1c |
| 35 | 16, 34 | addceq12d 4392 |
. . . . . . . . 9
 Nn Tc     Tc 1c   Tc Tc  Tc  1c  |
| 36 | 32, 35 | eqtrd 2385 |
. . . . . . . 8
 Nn Tc      1c   Tc Tc  Tc  1c  |
| 37 | 36 | eqeq2d 2364 |
. . . . . . 7
 Nn     
Tc    
 1c    
  Tc Tc 
Tc 
1c   |
| 38 | 5, 37 | mtbird 292 |
. . . . . 6
 Nn    
Tc    
 1c  |
| 39 | | peano2 4404 |
. . . . . . . . 9
     Nn      1c Nn  |
| 40 | 27, 39 | syl 15 |
. . . . . . . 8
 Nn      1c Nn  |
| 41 | | nntccl 6171 |
. . . . . . . 8
    
 1c Nn Tc    
 1c Nn  |
| 42 | 40, 41 | syl 15 |
. . . . . . 7
 Nn Tc      1c Nn  |
| 43 | | suc11nnc 4559 |
. . . . . . 7
    

Nn Tc      1c Nn      
1c
Tc    
 1c
1c
   
Tc    
 1c   |
| 44 | 27, 42, 43 | syl2anc 642 |
. . . . . 6
 Nn      
1c
Tc    
 1c
1c
   
Tc    
 1c   |
| 45 | 38, 44 | mtbird 292 |
. . . . 5
 Nn     
1c
Tc    
 1c
1c  |
| 46 | | id 19 |
. . . . . . 7
     
1c
   
 1c  |
| 47 | | tceq 6159 |
. . . . . . . 8
     
1c
Tc
Tc    
 1c  |
| 48 | 47 | addceq1d 4390 |
. . . . . . 7
     
1c
Tc 1c Tc    
 1c
1c  |
| 49 | 46, 48 | eqeq12d 2367 |
. . . . . 6
     
1c

Tc 1c     
1c
Tc    
 1c
1c   |
| 50 | 49 | notbid 285 |
. . . . 5
     
1c
 Tc 1c      1c
Tc    
 1c
1c   |
| 51 | 45, 50 | syl5ibrcom 213 |
. . . 4
 Nn     
 1c
Tc 1c   |
| 52 | | peano2 4404 |
. . . . . . . . 9
 Nn 
1c
Nn  |
| 53 | | nntccl 6171 |
. . . . . . . . 9
 
1c
Nn Tc 
1c
Nn  |
| 54 | 52, 53 | syl 15 |
. . . . . . . 8
 Nn Tc  1c
Nn  |
| 55 | | nnc3n3p2 6280 |
. . . . . . . 8
 Tc  1c
Nn
Nn  Tc  1c Tc 
1c Tc 
1c    
 2c  |
| 56 | 54, 2, 55 | syl2anc 642 |
. . . . . . 7
 Nn  Tc 
1c
Tc 
1c Tc 
1c    
 2c  |
| 57 | | 2nnc 6168 |
. . . . . . . . . . . . . 14
2c
Nn |
| 58 | | nncaddccl 4420 |
. . . . . . . . . . . . . 14
    

Nn 2c Nn      2c Nn  |
| 59 | 27, 57, 58 | sylancl 643 |
. . . . . . . . . . . . 13
 Nn      2c Nn  |
| 60 | | nnnc 6147 |
. . . . . . . . . . . . 13
    
 2c Nn     
2c
NC  |
| 61 | 59, 60 | syl 15 |
. . . . . . . . . . . 12
 Nn      2c NC  |
| 62 | | tcdi 6165 |
. . . . . . . . . . . 12
       2c NC 1c NC Tc       2c
1c
Tc    
 2c Tc 1c  |
| 63 | 61, 30, 62 | sylancl 643 |
. . . . . . . . . . 11
 Nn Tc     
 2c
1c
Tc    
 2c Tc 1c  |
| 64 | 63 | eqcomd 2358 |
. . . . . . . . . 10
 Nn Tc    
 2c Tc 1c Tc     
 2c
1c  |
| 65 | 33 | addceq2i 4388 |
. . . . . . . . . 10
Tc    
 2c Tc 1c
Tc    
 2c
1c |
| 66 | | addccom 4407 |
. . . . . . . . . . . . . . . . 17
 1c 1c   1c
1c  |
| 67 | | 1p1e2c 6156 |
. . . . . . . . . . . . . . . . . 18
1c
1c
2c |
| 68 | 67 | addceq2i 4388 |
. . . . . . . . . . . . . . . . 17
 1c 1c
 2c |
| 69 | 66, 68 | eqtr2i 2374 |
. . . . . . . . . . . . . . . 16
 2c
 1c 1c   |
| 70 | 69 | addceq1i 4387 |
. . . . . . . . . . . . . . 15
 
2c
1c
  1c 1c  1c |
| 71 | | addcass 4416 |
. . . . . . . . . . . . . . 15
 
2c
1c
 2c 1c  |
| 72 | | addcass 4416 |
. . . . . . . . . . . . . . 15
  1c 1c  1c  1c 1c  1c  |
| 73 | 70, 71, 72 | 3eqtr3i 2381 |
. . . . . . . . . . . . . 14
 2c 1c
 1c 1c  1c  |
| 74 | 73 | addceq2i 4388 |
. . . . . . . . . . . . 13
    2c 1c 
 
  1c
1c
 1c   |
| 75 | | addcass 4416 |
. . . . . . . . . . . . 13
     2c 1c
 
  2c 1c   |
| 76 | | addcass 4416 |
. . . . . . . . . . . . 13
    1c 1c
 1c     1c
1c
 1c   |
| 77 | 74, 75, 76 | 3eqtr4i 2383 |
. . . . . . . . . . . 12
     2c 1c
    1c 1c
 1c  |
| 78 | | addcass 4416 |
. . . . . . . . . . . 12
    
 2c
1c
     2c 1c  |
| 79 | | addc4 4418 |
. . . . . . . . . . . . 13
 
1c
 1c    1c 1c  |
| 80 | 79 | addceq1i 4387 |
. . . . . . . . . . . 12
  
1c
 1c  1c    
1c 1c  1c  |
| 81 | 77, 78, 80 | 3eqtr4i 2383 |
. . . . . . . . . . 11
    
 2c
1c
  
1c
 1c  1c  |
| 82 | | tceq 6159 |
. . . . . . . . . . 11
       2c
1c
  
1c
 1c  1c Tc       2c
1c
Tc    1c 
1c  1c   |
| 83 | 81, 82 | ax-mp 5 |
. . . . . . . . . 10
Tc       2c
1c
Tc    1c 
1c  1c  |
| 84 | 64, 65, 83 | 3eqtr3g 2408 |
. . . . . . . . 9
 Nn Tc    
 2c
1c
Tc    1c 
1c  1c   |
| 85 | | nnnc 6147 |
. . . . . . . . . . . . 13
 
1c
Nn  1c NC  |
| 86 | 52, 85 | syl 15 |
. . . . . . . . . . . 12
 Nn 
1c
NC  |
| 87 | | ncaddccl 6145 |
. . . . . . . . . . . 12
  
1c
NC  1c NC   1c 
1c NC  |
| 88 | 86, 86, 87 | syl2anc 642 |
. . . . . . . . . . 11
 Nn   1c 
1c NC  |
| 89 | | tcdi 6165 |
. . . . . . . . . . 11
    1c 
1c NC  1c NC Tc   
1c
 1c  1c Tc  
1c
 1c Tc 
1c   |
| 90 | 88, 86, 89 | syl2anc 642 |
. . . . . . . . . 10
 Nn Tc   
1c
 1c  1c Tc  
1c
 1c Tc 
1c   |
| 91 | | tcdi 6165 |
. . . . . . . . . . . 12
  
1c
NC  1c NC Tc  
1c
 1c Tc  1c Tc 
1c   |
| 92 | 86, 86, 91 | syl2anc 642 |
. . . . . . . . . . 11
 Nn Tc  
1c
 1c Tc  1c Tc 
1c   |
| 93 | 92 | addceq1d 4390 |
. . . . . . . . . 10
 Nn Tc  
1c
 1c Tc 
1c  Tc 
1c
Tc 
1c Tc 
1c   |
| 94 | 90, 93 | eqtrd 2385 |
. . . . . . . . 9
 Nn Tc   
1c
 1c  1c  Tc 
1c
Tc 
1c Tc 
1c   |
| 95 | 84, 94 | eqtrd 2385 |
. . . . . . . 8
 Nn Tc    
 2c
1c
 Tc  1c Tc 
1c Tc 
1c   |
| 96 | 95 | eqeq1d 2361 |
. . . . . . 7
 Nn  Tc    
 2c
1c
     2c 
Tc 
1c
Tc 
1c Tc 
1c    
 2c   |
| 97 | 56, 96 | mtbird 292 |
. . . . . 6
 Nn Tc    
 2c
1c
     2c  |
| 98 | | eqcom 2355 |
. . . . . 6
 Tc      2c 1c
  
  2c    
 2c Tc    
 2c
1c  |
| 99 | 97, 98 | sylnib 295 |
. . . . 5
 Nn     
2c
Tc    
 2c
1c  |
| 100 | | id 19 |
. . . . . . 7
     
2c
   
 2c  |
| 101 | | tceq 6159 |
. . . . . . . 8
     
2c
Tc
Tc    
 2c  |
| 102 | 101 | addceq1d 4390 |
. . . . . . 7
     
2c
Tc 1c Tc    
 2c
1c  |
| 103 | 100, 102 | eqeq12d 2367 |
. . . . . 6
     
2c

Tc 1c     
2c
Tc    
 2c
1c   |
| 104 | 103 | notbid 285 |
. . . . 5
     
2c
 Tc 1c      2c
Tc    
 2c
1c   |
| 105 | 99, 104 | syl5ibrcom 213 |
. . . 4
 Nn     
 2c
Tc 1c   |
| 106 | 25, 51, 105 | 3jaod 1246 |
. . 3
 Nn            1c      2c Tc 1c   |
| 107 | 106 | rexlimiv 2733 |
. 2
 
Nn           1c      2c Tc 1c  |
| 108 | 1, 107 | syl 15 |
1
 Nn Tc 1c  |