input: Write a function to generate a random equation using random numbers and operations.
  assert isinstance(generateRandomEquation(), str)
  assert len(generateRandomEquation()) == 3
output: import random
  
  def generateRandomEquation():
      operators = ['+', '-', '*', '/']
      num1 = str(random.randint(0, 9))
      num2 = str(random.randint(0, 9))
      operator = random.choice(operators)
      return num1 + operator + num2