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:
