Simplify:
(i) 
(ii) 
(iii) 
(i) 
We know that powers get subtracted in dividing, so,
(ii) 
We know that powers get subtracted in dividing, so,
(iii) 
We know that powers get subtracted in dividing, so,
= 
2
Simplify:
(i) (ii) (iii)
(i)
We know that powers get subtracted in dividing, so,
(ii)
We know that powers get subtracted in dividing, so,
(iii)
We know that powers get subtracted in dividing, so,
=