Answer:
Box 1: 
 
Box 2: 

Box 3: 

Box 4: 

Explanation:
See attachment for complete question.
Given

Required
Fill in the boxes

Box 1: We need to open the brackets.
This gives:

Box 2: Simplify individual bracket.
This gives:

Box 3: Collect Like Terms
This gives

Box 4: Perform operations on like terms

The boxes will be filled in the following order:
Box 1: 
 
Box 2: 

Box 3: 

Box 4: 
