$\"\"$ $\"\"$

The expression is $\"\"$

$\"\"$ (Distributive Property: a (b + c) = ab +ac )

$\"\"$ (Substitution Property: $\"\"$ )

$\"\"$ (Commutative Property of Addition)

$\"\"$

$\"\"$ (Associative Property of Addition)

$\"\"$ (Distributive property : a (b + c) = ab +ac)

$\"\"$ (Substitution Property: $\"\"$ )

$\"\"$

The simplified expression is $\"\"$ $\"\"$ .