Task: Question Understanding
Input (English): Let f(g) = -g**3 + g**2. Let j be f(-1). Let b be (6 - (j - 2)) + -1. Let t be (-6)/(-10) - (-648)/45. Solve 2*k = 5*k - t, 3*l = -b*k + 19 for l.
Output (English): algebra