Answer:
The steps used are 2,5,6,7.
Step-by-step explanation:
Given : Expression 
To find : Simplify and choose all the steps which will be part of your work ?
Solution :
Step 1 - Write the expression,

Step 2 - Solve the multiplication in bracket,

Step 3 - Solve the bracket,

Step 4 - Solve the square term,

Step 5 - Solve the product,

Step 6 - Add the terms,

Therefore, The steps used are 2,5,6,7.