The expression is .

                         (Substitute a = 8, b = 4, and c = 16) \

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 pf operations is turned into phrase

“Please Excuse My Dear Aunty Sally”

First operation is Evaluate power.

                           (Evaluate power: )

                          (Evaluate power: )

                          (Evaluate power: )

Next operation is Division.

                                (Divide: )

                              (Divide: )

Next operation is Addition.

                                    (Add: 16 + 0.25 = 16.25)

The value of the expression is 16.25.