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 Q]: Let h be (138 + 0)/3 - 2. Calculate the common denominator of (-37)/11 + 8/h and -34.
[EX A]: 11

[EX Q]: What is prob of sequence rrr when three letters picked without replacement from bbbrbbbbbwrrwrrrrr?
[EX A]: 7/102

[EX Q]: In base 9, what is 57046 + -3?
[EX A]:
57043