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: What is next in 30, 29, 26, 21, 14, 5?
Example Output: -6

Example Input: Evaluate (-1)/4 - (-6 - (-188)/32).
Example Output: -1/8

Example Input: Suppose 5*k + 2*c - 3 = -14, -3*k + 2*c = 13. Let s(d) = -d**3 - 2*d**2 - d + 4. What is the tens digit of s(k)?
Example Output:
1