$\"\"$

\

The expression is $\"\"$ .

\

The values are $\"\"$ and $\"\"$ .

\

Simplify the expression.

\

$\"\"$ (Original expression) \ \

\

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

\

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

\

$\"\"$ .

\

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

\

$\"\"$

\

The solution is $\"\"$ .