context: ###List of Questions
  (1) Let f(q) = -q**3 - 2*q**2 + 2*q + 5. Let r be f(-3). Suppose 505 = 5*d + 5*o, 0*o = 4*o - r. Calculate the greatest common factor of d and 9.
  (2) Solve 23*o = 21*o - 4*u + 18, 4*o - 2*u + 14 = 0 for o.
  (3) Calculate 51 divided by -17.
  (4) Two letters picked without replacement from {w: 4, v: 2, o: 1, q: 2, k: 2, x: 4}. What is prob of picking 1 o and 1 v?
  (5) Convert 38795.29 seconds to nanoseconds.
q_1: (1) Let f(q) = -q**3 - 2*q**2 + 2*q + 5. Let r be f(-3). Suppose 505 = 5*d + 5*o, 0*o = 4*o - r. Calculate the greatest common factor of d and 9.
q_2: (2) Solve 23*o = 21*o - 4*u + 18, 4*o - 2*u + 14 = 0 for o.
q_3: (3) Calculate 51 divided by -17.
q_4: (4) Two letters picked without replacement from {w: 4, v: 2, o: 1, q: 2, k: 2, x: 4}. What is prob of picking 1 o and 1 v?
q_5: (5) Convert 38795.29 seconds to nanoseconds.