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 2 v and 1 x when three letters picked without replacement from xmxvxmvvmmxmvx?

Ex Output:
15/182


Ex Input:
Suppose -2*t - 51 = -5*t + 3*l, 37 = 3*t + 4*l. Calculate the common denominator of 1*(308/32 + 3) and t.

Ex Output:
8


Ex Input:
What is prob of sequence ln when two letters picked without replacement from olaoonl?

Ex Output:

1/21