$\"\"$

The expression is $\"\"$ .

$\"\"$ (Substitute s = 4 and t = 8)

To simplify the expression follow the order of operations: (PEMDAS)

1. Evaluate the expressions inside Brackets/Parenthesis (P).

2. Evaluate Powers/Exponents (E).

3. Multiply and/or Divide in order from left to right (MD).

4. Add and/or Subtract in order from left to right (AS).

A simple technique for remembering the order of operations is turned

into phrase

“Please Excuse My Dear Aunty Sally” $\"\"$

First operation is Evaluate the expressions parenthesis.

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

Next operation is multiplication.

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

Next operation is division.

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

Next operation is addition.

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

The simplified expression value is 30.