3n 3 5n n 2 8n 2 3n 3 July 8, 2019 16 32 64 128 (4 + 3n) ⋅ (3n − 2n) − (n − 1) ⋅ 5n = ((2n)/(3 + n) + 9/(n ^ 2 - 3n + 9) - (n ^ 3 - 15n ^ 2)/(n ^ 3 + 27))(n + 3 - (9n)/(n + 3)) / (n + 3)
