context: ###List of Questions
  (1) Let a = 28 + -25. Solve 2*f + 14 = 4*s, 4*f + 3 = -a*s - 14 for f.
  (2) What is prob of picking 1 q, 1 p, and 1 s when three letters picked without replacement from cqqqqscqpc?
  (3) Suppose 3*h = -d - 598, 0 = 7*h - 2*h + d + 998. Let t = 299 + h. Suppose 15 = 2*q - 7. Calculate the greatest common factor of t and q.
  (4) Evaluate 3 + (0 - 4 - (-3 - 2)).
  (5) What is 72/5 of a litre in millilitres?
q_1: (1) Let a = 28 + -25. Solve 2*f + 14 = 4*s, 4*f + 3 = -a*s - 14 for f.
q_2: (2) What is prob of picking 1 q, 1 p, and 1 s when three letters picked without replacement from cqqqqscqpc?
q_3: (3) Suppose 3*h = -d - 598, 0 = 7*h - 2*h + d + 998. Let t = 299 + h. Suppose 15 = 2*q - 7. Calculate the greatest common factor of t and q.
q_4: (4) Evaluate 3 + (0 - 4 - (-3 - 2)).
q_5: (5) What is 72/5 of a litre in millilitres?