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 a(c) = -c**3 - 13*c**2 - 23*c - 5. Let s be a(-11). Calculate the highest common factor of s and 30.
[EX A]: 6

[EX Q]: What is 12/(-96)*2*1?
[EX A]: -1/4

[EX Q]: Suppose -3*c = -5*b + 9, -3*c + 4*b - 6 = -0*c. Suppose 0 = -c*y - 2*y. Let q be -1 + (-3 - 1)/(-4). Solve -4*g + 14 - 6 = y, q = 5*j + 5*g - 5 for j.
[EX A]:
-1