$\"\"$

The expression is $\"\"$ .

$\"\"$ (Substitute a = 3, c = $\"\"$ , d = $\"\"$ )

$\"\"$

Simplify the expression uisng order of operations (PEDMAS).

Since there are no parentheses first operation is evaluating powers.

$\"\"$ (Evaluate power: $\"\"$ )

$\"\"$

Next operation is multiplication.

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

Next operation is division.

$\"\"$ (Divide: $\"\"$ )

$\"\"$

The value of the expression is $\"\"$