First, the domain:
Since the function
Multiply the fractions:
Add like terms:
Since fractions don't exist where the denominators
Also, because the degree of the denominator is greater than the degree of the numerator, there is a horizontal asymptote at
If you don't know about the rules for asymptotes, reference this page: http://www.purplemath.com/modules/asymtote4.htm
Have fun! You can do this!