context: ###List of Questions
  (1) Three letters picked without replacement from jgdjdjjgdudjj. Give prob of picking 3 j.
  (2) What is sixty-four sevenths of a week in minutes?
  (3) Let c = 5 + 0. Solve -c*u = -2*u + 3 for u.
  (4) Let x(i) = i**3 + 5*i**2 - 6*i + 2. Let m be x(-6). Suppose 0 = -m*d + d + 13. What is the tens digit of d?
  (5) Calculate (-8)/(51/34*28/(-3)).
q_1: (1) Three letters picked without replacement from jgdjdjjgdudjj. Give prob of picking 3 j.
q_2: (2) What is sixty-four sevenths of a week in minutes?
q_3: (3) Let c = 5 + 0. Solve -c*u = -2*u + 3 for u.
q_4: (4) Let x(i) = i**3 + 5*i**2 - 6*i + 2. Let m be x(-6). Suppose 0 = -m*d + d + 13. What is the tens digit of d?
q_5: (5) Calculate (-8)/(51/34*28/(-3)).