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 -2*u + 2*o + 60 = 0, 4*u + 0*o = -5*o + 102. Calculate the highest common divisor of u and 42.
Example Output: 14

Example Input: Let a(y) = y**3 - 3*y**2 + 7*y - 10. Let m be a(2). Let k(p) = -p**3 + 2*p**2 + p + 1. Let r be k(2). Solve m = r*d + 16 - 1 for d.
Example Output: -5

Example Input: Suppose 4*v - 9 - 3 = 0. Suppose 5*d = -2*x, 3*x - x = -v*d. Suppose -14*k - 5*k = 0. Solve k = j - d*j - 1 for j.
Example Output:
1