$\"\"$

The expression is $\"\"$ .

$\"\"$ (Replace x, t and y with 3, 4 and 2)

To simplify the expression follow the order of operations:

1. Evaluate the expressions inside grouping symbols.

2. Evaluate powers.

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

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

A simple technique for remembering the order pf operations is turned into phrase

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

Evaluate the expression within the parenthesis.

$\"\"$ (Subtract: $\"\"$ )

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

Next operation is multiplication.

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

Next operation is addition.

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

The value of the expression is 20.