TASK DEFINITION: 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).
PROBLEM: Let o(y) = 6*y + 13. Calculate the remainder when 56 is divided by o(3).

SOLUTION: 25

PROBLEM: Let q = -7 - -11. Suppose q*l = 6*l. Solve 2*z - 4 = -2*f, l = -0*f + 3*f + z for f.

SOLUTION: -1

PROBLEM: Solve -k = -4*a + 15, 0 = 6*k - 10*k + a + 15 for k.

SOLUTION:
5