context: ###List of Questions
  (1) Calculate -15690 divided by -5.
  (2) Convert 155.2289 millennia to months.
  (3) Let l be ((-7)/(-3) + 0)*6. Let h(g) = g**3 - 2*g**2 - 3*g + 1. Let s be h(4). Calculate the highest common factor of l and s.
  (4) Three letters picked without replacement from {s: 5, f: 4, l: 1}. What is prob of picking 2 f and 1 l?
  (5) Solve 15*a + 29 = 104 for a.
q_1: (1) Calculate -15690 divided by -5.
q_2: (2) Convert 155.2289 millennia to months.
q_3: (3) Let l be ((-7)/(-3) + 0)*6. Let h(g) = g**3 - 2*g**2 - 3*g + 1. Let s be h(4). Calculate the highest common factor of l and s.
q_4: (4) Three letters picked without replacement from {s: 5, f: 4, l: 1}. What is prob of picking 2 f and 1 l?
q_5: (5) Solve 15*a + 29 = 104 for a.