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).
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Question: What is 0 + 5 - 15 - -5?

Answer: -5


Question: What is 12/(-96)*2*1?

Answer: -1/4


Question: Calculate prob of sequence kbal when four letters picked without replacement from {k: 2, l: 1, a: 4, b: 2, m: 1}.

Answer:
1/315