context: ###List of Questions
  (1) Evaluate (-1 - -3) + (14 - 12) + 1.
  (2) Calculate prob of sequence ll when two letters picked without replacement from {n: 3, l: 9}.
  (3) Let f = 184 - 40. Suppose -5*x - 4*c = -f, 0 = 2*c + 2*c + 16. Suppose b = -3*b + x. What is the units digit of b?
  (4) What is 7/4 of a year in months?
  (5) Suppose 2*t - 8 = 24. Suppose -a + t = 3*a. Solve 5*o - 5*z = 15, -a*o - 5*z + 35 = o for o.
q_1: (1) Evaluate (-1 - -3) + (14 - 12) + 1.
q_2: (2) Calculate prob of sequence ll when two letters picked without replacement from {n: 3, l: 9}.
q_3: (3) Let f = 184 - 40. Suppose -5*x - 4*c = -f, 0 = 2*c + 2*c + 16. Suppose b = -3*b + x. What is the units digit of b?
q_4: (4) What is 7/4 of a year in months?
q_5: (5) Suppose 2*t - 8 = 24. Suppose -a + t = 3*a. Solve 5*o - 5*z = 15, -a*o - 5*z + 35 = o for o.