Prove trig. identity (20 points)

Plz which expression is equivalent to the expression below?

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)