For the problem 1 g − 1 − g + 1 3 g − 1 , Tyson created an equivalent expression to 5 10 10 10 the problem using the following steps: 1g−1−g+13g−1 5 10 10 10 −4g+11 5 10 Is his final expression equivalent to the initial expression? Show how you know. If the two expressions are not equivalent, find Tyson’s mistake and correct it.