context: ###List of Questions
  (1) 7/((-1008)/(-102)) - 18/48
  (2) Solve 5*c = 3*z - 31, 0*c + c + 7 = z for c.
  (3) What is 13/4 of a century in months?
  (4) Three letters picked without replacement from {f: 11, i: 2, p: 1}. What is prob of sequence pff?
  (5) Let n = -34 + 77. Calculate the remainder when n is divided by 9.
q_1: (1) 7/((-1008)/(-102)) - 18/48
q_2: (2) Solve 5*c = 3*z - 31, 0*c + c + 7 = z for c.
q_3: (3) What is 13/4 of a century in months?
q_4: (4) Three letters picked without replacement from {f: 11, i: 2, p: 1}. What is prob of sequence pff?
q_5: (5) Let n = -34 + 77. Calculate the remainder when n is divided by 9.