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

The expression is $\"\"$ .

$\"\"$ (Distribute 6)

$\"\"$ (Multiply: $\"\"$ )

Group like terms using commutative property of addition: a + b = b + a.

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

Combine like terms using distributive property: $\"\"$ .

$\"\"$

$\"\"$ (Subtract: $\"\"$ )

$\"\"$ (Add: $\"\"$ ) $\"\"$

The simplified expression is $\"\"$ .