Triple-key multiplication
Each green capital letter represents a different digit 0-9.  Each black lower-case letter represents a different digit 0-9.  Each blue italic letter in the product represents a different digit 0-9.  Each set of 10 letters spells out a different phrase when arranged in the order 0987654321.

        TRYST               
0 9 876 54321
     x  audio     CAPITALS
       GROUSE              
      dtptmm                
09 8765 4321
     pumper       lowercase         
    NONISY                 
   RSSTTY                   
0987 654 321
   PUBLISHODE     PRODUCT


Topless Division

               ..
.......).........
        LRATTNNM 
         ELRERIEF
         ERETEOMF
          FNTNITR


The digits in order 1-0 spell out a three word phrase, thematically related to the missing dividend, divisor, and quotient.


Undecimal (Base 11) Tenth Root

             T
10 V DALMATIAN
    
DACHSHUND
        LHNSDD

(Two words, 3081A7 69254)