$\"\"$

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” $\"\"$

In the given expression there are no grouping symbols.

First simplify the numerator.

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

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

The value of the expression is 16.