context: ###List of Questions
  (1) Convert 54.15662 centimeters to kilometers.
  (2) Four letters picked without replacement from {y: 3, t: 4, x: 2, r: 4, k: 1, o: 1}. What is prob of picking 2 y, 1 o, and 1 r?
  (3) Suppose -5*z + 25 = -4*z. What is the remainder when z is divided by 14 - (-2 + (5 - 2))?
  (4) What is the value of (-19 - -12) + (-6 - -5) - -15?
  (5) Let u(z) = -3*z - z**2 + 4 - 3 - 5*z + 5. Let i be u(-8). Solve -5*h - i - 4 = 0 for h.
q_1: (1) Convert 54.15662 centimeters to kilometers.
q_2: (2) Four letters picked without replacement from {y: 3, t: 4, x: 2, r: 4, k: 1, o: 1}. What is prob of picking 2 y, 1 o, and 1 r?
q_3: (3) Suppose -5*z + 25 = -4*z. What is the remainder when z is divided by 14 - (-2 + (5 - 2))?
q_4: (4) What is the value of (-19 - -12) + (-6 - -5) - -15?
q_5: (5) Let u(z) = -3*z - z**2 + 4 - 3 - 5*z + 5. Let i be u(-8). Solve -5*h - i - 4 = 0 for h.