TASK DEFINITION: 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).
PROBLEM: Calculate prob of sequence ppy when three letters picked without replacement from {y: 2, p: 2}.

SOLUTION: 1/6

PROBLEM: Let a(c) = -c**3 - 13*c**2 - 23*c - 5. Let s be a(-11). Calculate the highest common factor of s and 30.

SOLUTION: 6

PROBLEM: Suppose -3*u + 4*u - 5 = 0. Let n be 1*u*(-8)/(-20). Solve n*o + 3 = -7 for o.

SOLUTION:
-5