5c^3-5 / c+2 * 13c+26 / (c+1)^2-c 65c^4 / (c+2)((c+1)^2-c) + 130c^3 / (c+2)((c+1)^2-c) - 65c / (c+2)((c+1)^2-c) - 130 / (c+2)((c+1)^2-c) 65c-65 c=1