context: ###List of Questions
  (1) Calculate -0.3*-1.58.
  (2) Let i be 1 - -1 - 0 - -2. Suppose -i*q - 9 = -7*q. Solve -4*l + 3*w = l - 1, q*w = -6 for l.
  (3) Let o(c) = 2*c**2 - 5*c. Let k be o(4). Let z = k + 12. What is the remainder when 47 is divided by z?
  (4) Three letters picked without replacement from mwwswwmswmuummwwmwww. What is prob of sequence usm?
  (5) What is 3/5 of a millennium in decades?
q_1: (1) Calculate -0.3*-1.58.
q_2: (2) Let i be 1 - -1 - 0 - -2. Suppose -i*q - 9 = -7*q. Solve -4*l + 3*w = l - 1, q*w = -6 for l.
q_3: (3) Let o(c) = 2*c**2 - 5*c. Let k be o(4). Let z = k + 12. What is the remainder when 47 is divided by z?
q_4: (4) Three letters picked without replacement from mwwswwmswmuummwwmwww. What is prob of sequence usm?
q_5: (5) What is 3/5 of a millennium in decades?