Task: Question Answering
Input (English): Let w(j) = -j**3 + 5*j**2 + 9*j - 8. Let u be w(6). Let c = u + -6. Let d be (-1)/(1 + (-6)/c). Solve k = -2*f + 9, -f + d = k + 2*k for k.
Output (English): -1