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:
Two letters picked without replacement from {i: 3, v: 2}. Give prob of sequence iv.

Ex Output:
3/10


Ex Input:
Four letters picked without replacement from qfqyqqcyiicqf. What is prob of sequence icyf?

Ex Output:
2/2145


Ex Input:
Suppose 0 = 5*u - 2*w, 2*w + 0*w = u + 8. Solve -f - 1 = -4*h + 5*h, -26 = u*h - 4*f for h.

Ex Output:

-5