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:
Solve 0 = -p + 1, -38 + 15 = 5*h + 2*p for h.

Ex Output:
-5


Ex Input:
Let g = -89 - -94. Solve 2*i + 1 = -g for i.

Ex Output:
-3


Ex Input:
Let n = 2 - -4. Let f be n*2*(-15)/(-9). Calculate the highest common factor of 50 and f.

Ex Output:

10