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: Calculate ((-2)/3)/(-1 - (-24)/9).
Example Output: -2/5

Example Input: Suppose 3*f + n = -0*n + 13, -5*n + 20 = 0. Suppose f = 3*d - 3. Suppose 6 = -p + 7. What is the remainder when d is divided by p?
Example Output: 0

Example Input: Let v be (-21)/1*(-2)/6. Suppose -5*o - 3*y = -117 - 8, 5*y + 165 = 5*o. Calculate the highest common divisor of o and v.
Example Output:
7