\

The expression is 

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.

So, the first operation is evaluating expression inside the brackets.

                           (Subtract;)

                                 (Add;)

Next operation is multiplication.

                                       (Multiply;)

The value of given expression is 42.