$\"\"$

Simplify $\"\"$ .

$\"\"$ (Orginal expression)

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Multiply)

$\"\"$ (Simplify)

Therefore,the value of $\"\"$ is $\"\"$ .

Curits simplification is correct because of Tara has subtracted $\"\"$ before multiplying $\"\"$ by $\"\"$ .

$\"\"$

Curits simplification is correct.