I think it's C,But I'm not sure
Answer: The simplified form is 
Step-by-step explanation:
Since we have given that

As we know the "Exponential law":

So, it becomes

Now, at last it becomes,

Hence, the simplified form is 
X - 3y + z
Another term would be the 3rd term which would be working with 3d planes instead of 2d planes.
Answer:
B
Step-by-step explanation:
<span>This property is called associativity. It shows that it doesn't matter whether you perform the sum on the first two numbers and then the third, or on the second two and then the first, because you will get the same answer either way. That is because addition is associative.</span>