| Step | Hyp | Ref
| Expression |
| 1 | | mbfmul.1 |
. . . . 5
 MblFn |
| 2 | | mbff 23394 |
. . . . 5
 MblFn       |
| 3 | 1, 2 | syl 17 |
. . . 4
       |
| 4 | | ffn 6045 |
. . . 4
       |
| 5 | 3, 4 | syl 17 |
. . 3
   |
| 6 | | mbfmul.2 |
. . . . 5
 MblFn |
| 7 | | mbff 23394 |
. . . . 5
 MblFn       |
| 8 | 6, 7 | syl 17 |
. . . 4
       |
| 9 | | ffn 6045 |
. . . 4
       |
| 10 | 8, 9 | syl 17 |
. . 3
   |
| 11 | | mbfdm 23395 |
. . . 4
 MblFn
  |
| 12 | 1, 11 | syl 17 |
. . 3
   |
| 13 | | mbfdm 23395 |
. . . 4
 MblFn
  |
| 14 | 6, 13 | syl 17 |
. . 3
   |
| 15 | | eqid 2622 |
. . 3

    |
| 16 | | eqidd 2623 |
. . 3
 
           |
| 17 | | eqidd 2623 |
. . 3
 
           |
| 18 | 5, 10, 12, 14, 15, 16, 17 | offval 6904 |
. 2
                    |
| 19 | | elin 3796 |
. . . . . . . . 9
  
    |
| 20 | 19 | simplbi 476 |
. . . . . . . 8
  
  |
| 21 | | ffvelrn 6357 |
. . . . . . . 8
      
      |
| 22 | 3, 20, 21 | syl2an 494 |
. . . . . . 7
 
         |
| 23 | 19 | simprbi 480 |
. . . . . . . 8
  
  |
| 24 | | ffvelrn 6357 |
. . . . . . . 8
      
      |
| 25 | 8, 23, 24 | syl2an 494 |
. . . . . . 7
 
         |
| 26 | 22, 25 | remuld 13958 |
. . . . . 6
 
                                                         |
| 27 | 26 | mpteq2dva 4744 |
. . . . 5
                                                               |
| 28 | | inmbl 23310 |
. . . . . . 7
 
     |
| 29 | 12, 14, 28 | syl2anc 693 |
. . . . . 6
     |
| 30 | | ovexd 6680 |
. . . . . 6
 
                       |
| 31 | | ovexd 6680 |
. . . . . 6
 
                       |
| 32 | 22 | recld 13934 |
. . . . . . 7
 
             |
| 33 | 25 | recld 13934 |
. . . . . . 7
 
             |
| 34 | | eqidd 2623 |
. . . . . . 7
              
            |
| 35 | | eqidd 2623 |
. . . . . . 7
              
            |
| 36 | 29, 32, 33, 34, 35 | offval2 6914 |
. . . . . 6
                
                                   |
| 37 | 22 | imcld 13935 |
. . . . . . 7
 
             |
| 38 | 25 | imcld 13935 |
. . . . . . 7
 
             |
| 39 | | eqidd 2623 |
. . . . . . 7
              
            |
| 40 | | eqidd 2623 |
. . . . . . 7
              
            |
| 41 | 29, 37, 38, 39, 40 | offval2 6914 |
. . . . . 6
                
                                   |
| 42 | 29, 30, 31, 36, 41 | offval2 6914 |
. . . . 5
                                
                          
                                          |
| 43 | 27, 42 | eqtr4d 2659 |
. . . 4
                                                  
                           |
| 44 | | inss1 3833 |
. . . . . . . . . 10


 |
| 45 | | resmpt 5449 |
. . . . . . . . . 10
  
 
                  |
| 46 | 44, 45 | ax-mp 5 |
. . . . . . . . 9
           
       |
| 47 | 3 | feqmptd 6249 |
. . . . . . . . . . 11
         |
| 48 | 47, 1 | eqeltrrd 2702 |
. . . . . . . . . 10
       MblFn |
| 49 | | mbfres 23411 |
. . . . . . . . . 10
        MblFn          

 
MblFn |
| 50 | 48, 29, 49 | syl2anc 693 |
. . . . . . . . 9
  
        MblFn |
| 51 | 46, 50 | syl5eqelr 2706 |
. . . . . . . 8
         MblFn |
| 52 | 22 | ismbfcn2 23406 |
. . . . . . . 8
          MblFn              MblFn
            MblFn   |
| 53 | 51, 52 | mpbid 222 |
. . . . . . 7
              MblFn
            MblFn  |
| 54 | 53 | simpld 475 |
. . . . . 6
             MblFn |
| 55 | | inss2 3834 |
. . . . . . . . . 10


 |
| 56 | | resmpt 5449 |
. . . . . . . . . 10
  
 
                  |
| 57 | 55, 56 | ax-mp 5 |
. . . . . . . . 9
           
       |
| 58 | 8 | feqmptd 6249 |
. . . . . . . . . . 11
         |
| 59 | 58, 6 | eqeltrrd 2702 |
. . . . . . . . . 10
       MblFn |
| 60 | | mbfres 23411 |
. . . . . . . . . 10
        MblFn          

 
MblFn |
| 61 | 59, 29, 60 | syl2anc 693 |
. . . . . . . . 9
  
        MblFn |
| 62 | 57, 61 | syl5eqelr 2706 |
. . . . . . . 8
         MblFn |
| 63 | 25 | ismbfcn2 23406 |
. . . . . . . 8
          MblFn              MblFn
            MblFn   |
| 64 | 62, 63 | mpbid 222 |
. . . . . . 7
              MblFn
            MblFn  |
| 65 | 64 | simpld 475 |
. . . . . 6
             MblFn |
| 66 | | eqid 2622 |
. . . . . . 7
                         |
| 67 | 32, 66 | fmptd 6385 |
. . . . . 6
                     |
| 68 | | eqid 2622 |
. . . . . . 7
                         |
| 69 | 33, 68 | fmptd 6385 |
. . . . . 6
                     |
| 70 | 54, 65, 67, 69 | mbfmullem 23492 |
. . . . 5
                
           MblFn |
| 71 | 53 | simprd 479 |
. . . . . 6
             MblFn |
| 72 | 64 | simprd 479 |
. . . . . 6
             MblFn |
| 73 | | eqid 2622 |
. . . . . . 7
                         |
| 74 | 37, 73 | fmptd 6385 |
. . . . . 6
                     |
| 75 | | eqid 2622 |
. . . . . . 7
                         |
| 76 | 38, 75 | fmptd 6385 |
. . . . . 6
                     |
| 77 | 71, 72, 74, 76 | mbfmullem 23492 |
. . . . 5
                
           MblFn |
| 78 | 70, 77 | mbfsub 23429 |
. . . 4
                                
                         MblFn |
| 79 | 43, 78 | eqeltrd 2701 |
. . 3
                   MblFn |
| 80 | 22, 25 | immuld 13959 |
. . . . . 6
 
                                                         |
| 81 | 80 | mpteq2dva 4744 |
. . . . 5
                                                               |
| 82 | | ovexd 6680 |
. . . . . 6
 
                       |
| 83 | | ovexd 6680 |
. . . . . 6
 
                       |
| 84 | 29, 32, 38, 34, 40 | offval2 6914 |
. . . . . 6
                
                                   |
| 85 | 29, 37, 33, 39, 35 | offval2 6914 |
. . . . . 6
                
                                   |
| 86 | 29, 82, 83, 84, 85 | offval2 6914 |
. . . . 5
                                
                          
                                          |
| 87 | 81, 86 | eqtr4d 2659 |
. . . 4
                                                  
                           |
| 88 | 54, 72, 67, 76 | mbfmullem 23492 |
. . . . 5
                
           MblFn |
| 89 | 71, 65, 74, 69 | mbfmullem 23492 |
. . . . 5
                
           MblFn |
| 90 | 88, 89 | mbfadd 23428 |
. . . 4
                                
                         MblFn |
| 91 | 87, 90 | eqeltrd 2701 |
. . 3
                   MblFn |
| 92 | 22, 25 | mulcld 10060 |
. . . 4
 
               |
| 93 | 92 | ismbfcn2 23406 |
. . 3
                MblFn                    MblFn
                  MblFn   |
| 94 | 79, 91, 93 | mpbir2and 957 |
. 2
               MblFn |
| 95 | 18, 94 | eqeltrd 2701 |
1
    MblFn |