The expression is  

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 of operations is turned into phrase

“Please Excuse My Dear Aunty Sally”

In the given expression there are no grouping symbols.

First operation is Addition

                                  (Add )

First operation is Subtraction \ \

                                                  (Subtract: ) \ \

Next operation is Addition

                                              (Add )                                        

  False \ \

The equation is false.