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 prob of sequence woq when three letters picked without replacement from woqcvkc.

Ex Output:
1/210


Ex Input:
Let c(t) = t + 12. Let z be c(-10). Solve -8 - z = 5*g for g.

Ex Output:
-2


Ex Input:
Suppose -l + 57 = 8. What is the tens digit of l?

Ex Output:

4