context: ###List of Questions
  (1) What is 7/2 of a litre in millilitres?
  (2) Let f(k) = -k**3 - 8*k**2 - 4*k. Let p be f(-9). Let d = p + 15. Suppose -z - 2 = -14. Calculate the greatest common divisor of d and z.
  (3) Solve -b - 2*q = 2*q + 21, 2*q - 17 = 5*b for b.
  (4) Evaluate -1 - (0 + 0 - -1).
  (5) Two letters picked without replacement from apxpppaadx. Give prob of sequence aa.
q_1: (1) What is 7/2 of a litre in millilitres?
q_2: (2) Let f(k) = -k**3 - 8*k**2 - 4*k. Let p be f(-9). Let d = p + 15. Suppose -z - 2 = -14. Calculate the greatest common divisor of d and z.
q_3: (3) Solve -b - 2*q = 2*q + 21, 2*q - 17 = 5*b for b.
q_4: (4) Evaluate -1 - (0 + 0 - -1).
q_5: (5) Two letters picked without replacement from apxpppaadx. Give prob of sequence aa.