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 prob of picking 3 h and 1 t when four letters picked without replacement from {h: 6, n: 4, t: 5}?

Ex Output:
20/273


Ex Input:
In base 5, what is -3 - 102241?

Ex Output:
-102244


Ex Input:
Let q = -3 + 3. Suppose -2*p + 8 = 4*o - q*p, -5*o = -4*p - 10. Solve 2*z + o*s - 5 = -3, -4*z + 3 = 3*s for z.

Ex Output:

0