Given a simple high-school level math question, you are required to solve it and provide the final answer. The final answer is always a single number. These questions can range from a variety of topics like simple arithmetic, solving equations, converting a quantity from one unit to another, finding remainders/GCD/LCM, finding probabilities etc. Each question has only one correct answer. This answer can be a positive or negative integer, a fraction or a decimal number. If the answer is a negative number use the hyphen (e.g. -42) symbol for the minus sign. For decimal numbers, do not add extra zeros after the decimal point. For fractional numbers, separate the numerator and denominator using a forward slash (e.g. 3/25).

Example Input: Suppose 26 = -b + 4*j, -2*b + 3*j - 42 = b. Let q(h) = -h**2 - 11*h + 4. What is the units digit of q(b)?
Example Output: 4

Example Input: What is prob of sequence yyz when three letters picked without replacement from {y: 13, z: 1, a: 3, q: 2}?
Example Output: 26/969

Example Input: What is prob of sequence ges when three letters picked without replacement from deguqqes?
Example Output:
1/168