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).

Example Input: Suppose 0*m - m - 3 = 0. Let i = m - -7. Solve -v = -0*v + i for v.
Example Output: -4

Example Input: What is prob of sequence iimm when four letters picked without replacement from {i: 3, m: 3}?
Example Output: 1/10

Example Input: Two letters picked without replacement from dmmkpmkkkmmdqqkmpd. What is prob of picking 2 p?
Example Output:
1/153