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:
Calculate (-3*2/3)/2.

Ex Output:
-1


Ex Input:
What is the next term in -147, -149, -151, -153?

Ex Output:
-155


Ex Input:
Suppose -2 = 4*y - 2*n - 14, -4 = 2*n. Let i(l) be the third derivative of l**5/60 + l**4/8 - l**3/6 + l**2. What is the units digit of i(y)?

Ex Output:

9