$\"\"$

\

The expression is $\"\"$ .

\

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

\

To subtract an integer , add its opposite.

\

Opposite of $\"\"$ is 6.

\

$\"\"$ (Add 6 to 4)

\

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

\

The value of the expression when $\"\"$ is 10.