simplify the rational expression. state any restrictions on the variable.

(n^4 - 11n^2 + 30)/(n^4 - 7n^2 + 10)

(n^2 - 6)(n^2 - 5) / ((n - 2)(n - 5)(n - 1)(n - 5))

Restrictions: n cannot equal 2, 1, or 5.