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).

Example Input: Suppose 3*j - 5*m = 41, 5*j + 0*j = 4*m + 77. Suppose -2*p - p - j = -5*x, -2*x - 3*p = 10. What is the units digit of (x + 0)*(3 - -8)?
Example Output: 1

Example Input: Calculate 270 divided by -45.
Example Output: -6

Example Input: In base 13, what is 2b4a - 3?
Example Output:
2b47