context: ###List of Questions
  (1) Let x = 17 - 12. Suppose 0 = -f - 2*f - l + 61, 105 = x*f + 5*l. What is the highest common divisor of 30 and f?
  (2) How many hours are there in 379.1952 minutes?
  (3) What is prob of picking 3 m when three letters picked without replacement from ymyymtmyyymvymmvyymm?
  (4) Let w be 94/18 + 4/(-18). Let i(j) = j**3 + j**2 - 4*j + 6. Let y be i(4). Let q be (1 + 1/(-2))*y. Solve -x - 10 = -0*x - 5*r, -4*x - w*r = -q for x.
  (5) What is 6*(16/20)/(6/5)?
q_1: (1) Let x = 17 - 12. Suppose 0 = -f - 2*f - l + 61, 105 = x*f + 5*l. What is the highest common divisor of 30 and f?
q_2: (2) How many hours are there in 379.1952 minutes?
q_3: (3) What is prob of picking 3 m when three letters picked without replacement from ymyymtmyyymvymmvyymm?
q_4: (4) Let w be 94/18 + 4/(-18). Let i(j) = j**3 + j**2 - 4*j + 6. Let y be i(4). Let q be (1 + 1/(-2))*y. Solve -x - 10 = -0*x - 5*r, -4*x - w*r = -q for x.
q_5: (5) What is 6*(16/20)/(6/5)?