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 ee when two letters picked without replacement from {p: 5, e: 3}.

Ex Output:
3/28


Ex Input:
How many decades are there in 8/25 of a millennium?

Ex Output:
32


Ex Input:
Suppose 2*t - 8 = 24. Suppose -a + t = 3*a. Solve 5*o - 5*z = 15, -a*o - 5*z + 35 = o for o.

Ex Output:

5