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: Total of 0.0149 and 0.8.
Example Output: 0.8149

Example Input: Let y be (1 - -1)/(-1) + -25. What is the common denominator of 117/10 and (y/(-30))/((-9)/(-111))?
Example Output: 10

Example Input: Let o(a) = 4*a + 3. Let c be o(3). Suppose d = -0*d - 4*i - c, -3*d = 5*i + 17. Suppose -y + 5 - d = 0. What is the units digit of y?
Example Output:
4