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).

Q: Let o(y) = 6*y + 13. Calculate the remainder when 56 is divided by o(3).

A: 25
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Q: Calculate prob of picking 4 b when four letters picked without replacement from bddbbdbdbddbbbdbbddb.

A: 22/323
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Q: Two letters picked without replacement from {t: 1, w: 4, d: 1, j: 2, a: 2}. Give prob of picking 1 a and 1 w.

A:
8/45
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