$\"\"$

The function is $\"\"$

$\"\"$ (Substitute 2 for x)

$\"\"$ (Find power: $\"\"$ )

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

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

$\"\"$ (Apply Additive inverse property: $\"\"$ ) $\"\"$

The solution is $\"\"$ .