Answer:   
36x-3y+4z^2+26-7x^2
Step-by-step explanation:
Okay well for starters, you can't subtract that because it's an expression, not an equation. And secondly, there was '?' which I'm going to assue=me was a typing error. 
Now to actually simplify this mess of an expression, you just need to combine the like-terms! Once you do that you really can't do anything else, since you don't know the varibles. 
 
        
             
        
        
        
Answer:
subtraction
Step-by-step explanation:
just did it and got it right 
 
        
             
        
        
        
Answer:
4,5,8,11 are domain
Step-by-step explanation:
Since they are on the x side they are domain 
 
        
             
        
        
        
Answer:
distributive property
Step-by-step explanation:
The distributive property is described as
a(b + c) = ab + ac
5(12 - 4) = 5(12) - 5(4) ← is obtained using the distributive property