Adding and Subtracting Polynomials

#1.  (9n^5 + 2n − 11) − (11n − 7n^5 + 3) − (5 + 7n)

#2. (7r^2 + r^3 − 3) + (6r^3 − 3r^2 + 10) + (2 + r^2 )