SHORT ANSWER: A student writes the following INCORRECT solution for simplifying a rational expression. They happen to get the correct answer.

SHORT ANSWER: A student writes the following INCORRECT solution for simplifying a rational expression. They happen to get the correct answer.  Describe the mistake going from step 1 to step 2 and the mistake going from step 2 to step 3 and explain why it is an error.  Then give a correct step 2.

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