Task: Question Answering
Input (English): Let c(r) be the second derivative of -r**5/20 + r**4 - r**3/6 + 15*r**2/2 - 2*r. Let g be c(12). Solve -5*p = 3*o + 13, -6*p - 11 = 5*o - g*p for o.
Output (English): -1