context: ###List of Questions
  (1) Let o(s) = 4 + s**3 + s + 0*s + 10*s**2 + 6 + 1. Let n be o(-10). Calculate the highest common factor of n and 5.
  (2) Convert 39934.71m to micrometers.
  (3) Evaluate (2 + -8 - -2) + -120 + 129.
  (4) What is next in 6, 12, 18?
  (5) Calculate prob of sequence zs when two letters picked without replacement from {z: 1, q: 5, s: 5}.
q_1: (1) Let o(s) = 4 + s**3 + s + 0*s + 10*s**2 + 6 + 1. Let n be o(-10). Calculate the highest common factor of n and 5.
q_2: (2) Convert 39934.71m to micrometers.
q_3: (3) Evaluate (2 + -8 - -2) + -120 + 129.
q_4: (4) What is next in 6, 12, 18?
q_5: (5) Calculate prob of sequence zs when two letters picked without replacement from {z: 1, q: 5, s: 5}.