input: Write a function to perform basic arithmetic operations on two integers. The function should accept two integers as inputs and output the results of addition, subtraction, multiplication, division, and modulo operations. If either of the inputs is not an integer, the function should return an error message.
  assert math_operations(10, 5) == 'Addition: 15\nSubtraction: 5\nMultiplication: 50\nDivision: 2.0\nModulo: 0'
  assert math_operations(10, 0) == 'Division by zero error'
  assert math_operations(10, 'a') == 'Input must be integers'
  assert math_operations([], 5) == 'Input must be integers'
output: def math_operations(a, b):
      if not isinstance(a, int) or not isinstance(b, int):
          return 'Input must be integers'
      try:
          return f'Addition: {a + b}\nSubtraction: {a - b}\nMultiplication: {a * b}\nDivision: {a / b}\nModulo: {a % b}'
      except ZeroDivisionError:
          return 'Division by zero error'