context: ###List of Questions
  (1) Three letters picked without replacement from {g: 2, s: 8, l: 2, r: 4}. Give prob of sequence glr.
  (2) What is 920.9407nm in millimeters?
  (3) 13/(-5) - (-1 + 3)/(-1)
  (4) Suppose b + 3*k + k = 7, 5*k - 20 = -5*b. Suppose 2*l + 4 = 0, -l - 16 - 1 = -5*d. Solve -b*q - 14 = d*o - 2, 4*q = 5*o + 20 for q.
  (5) Let u(q) = -q**2 - 6*q - 3. Let s be u(-2). Suppose -p + 3 + 0 = 0, 315 = s*h + 5*p. Calculate the highest common divisor of 40 and h.
q_1: (1) Three letters picked without replacement from {g: 2, s: 8, l: 2, r: 4}. Give prob of sequence glr.
q_2: (2) What is 920.9407nm in millimeters?
q_3: (3) 13/(-5) - (-1 + 3)/(-1)
q_4: (4) Suppose b + 3*k + k = 7, 5*k - 20 = -5*b. Suppose 2*l + 4 = 0, -l - 16 - 1 = -5*d. Solve -b*q - 14 = d*o - 2, 4*q = 5*o + 20 for q.
q_5: (5) Let u(q) = -q**2 - 6*q - 3. Let s be u(-2). Suppose -p + 3 + 0 = 0, 315 = s*h + 5*p. Calculate the highest common divisor of 40 and h.