\ \
The expression is

(substitute y = 8)
To simplify the expression following order of operations to performed:
\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. \ \
In the given expression there are no grouping symbols.
\First operation is evaluating power.
\
(Evaluate:
)
Next operation is subtraction.
\
(Subtract:
) \ \
The value of the expression is
.