context: ###List of Questions
  (1) What is -5 - -2 - ((2 - 3) + 1)?
  (2) Let z = -121 - -143. What is the lowest common multiple of z and 12?
  (3) What is prob of sequence uuuz when four letters picked without replacement from zubuububqqq?
  (4) Let t be (10/25)/((-8)/(-20)). Solve -i + t = -0 for i.
  (5) Convert 5396.8g to nanograms.
q_1: (1) What is -5 - -2 - ((2 - 3) + 1)?
q_2: (2) Let z = -121 - -143. What is the lowest common multiple of z and 12?
q_3: (3) What is prob of sequence uuuz when four letters picked without replacement from zubuububqqq?
q_4: (4) Let t be (10/25)/((-8)/(-20)). Solve -i + t = -0 for i.
q_5: (5) Convert 5396.8g to nanograms.