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:
Evaluate 6/(-28)*1*(-16)/12.

Ex Output:
2/7


Ex Input:
Four letters picked without replacement from wkakwuuwuuukwwuuwuu. Give prob of picking 3 w and 1 a.

Ex Output:
5/969


Ex Input:
Suppose 0 = f + 1, 17*f = 5*w + 12*f - 15. Suppose -3*s + 2 = -13. Suppose s*c + 3*j = 36, 3*c + 0*j - 18 = -3*j. Solve 20 = a - 5*z, -2*a + c = -w*z - 7 for a.

Ex Output:

5