The expression is 

                  (Rewrite the expression as division expression)

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.

According order of operations inside the grouping symbols should be evaluated first.

First operation is evaluating expression inside the parentheses.

              (Subtract the numbers in the numerator:)

                     (Add the numbers in the denominator: )

Next operation is division.

                             (Divide:)

The value of the expression is 2