Answer:
Check below
Explanation:
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1.

In this case we have the Associate Property, since we can associate two, or even three terms without modify the final result.
2.

Distributive Property, note that that the right side is the left side rewritten as a product, with the GCF outside the brackets.
3. Commutative Property

The order of these sum does not compromise the result.
4.

Combining like terms, similar terms are operated together.