C 2c 2c 4 4c 1 c 5 July 8, 2019 16 32 64 128 (c ^ 2 + 4c + 4)/(c ^ 2 - 4) / (c + 2) (c ^ 2 + 4c + 4)/(c ^ 2 - 4) 4 5c-2 3c+0 2c
