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:
(-4 - 0) + 0 + 10 + -6

Ex Output:
0


Ex Input:
Let p(x) = -5*x + 1. Let o be p(-2). Let b = 22 - o. Calculate the highest common factor of 44 and b.

Ex Output:
11


Ex Input:
Solve 2*d - 18 = 6*k, 5*k = -0*d + d - 13 for d.

Ex Output:

3