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).

Ex Input:
What is the next term in 52, 101, 150, 199?

Ex Output:
248


Ex Input:
0.3539 - 5

Ex Output:
-4.6461


Ex Input:
Let r be 0/(0 + 2 + -1). Let t(q) = -q**2 + 4*q - 1. Let f be t(3). Suppose m - 8 = -f*i, r*i + i = 0. What is the units digit of m?

Ex Output:

8