PLEASE ANSWER IT CORRECTLY​

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

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

Solve for n? [tex]z = \frac{3}{4} mn[/tex]