input: Write a python function to perform basic arithmetic operations on fractions.
  assert str(Fraction(1, 2) + Fraction(1, 3)) == '5/6'
  assert str(Fraction(1, 2) - Fraction(1, 3)) == '1/6'
  assert str(Fraction(1, 2) * Fraction(1, 3)) == '1/6'
  assert str(Fraction(1, 2) / Fraction(1, 3)) == '3/2'
output: from fractions import Fraction
  
  def fraction_operations():
      assert str(Fraction(1, 2) + Fraction(1, 3)) == '5/6'
      assert str(Fraction(1, 2) - Fraction(1, 3)) == '1/6'
      assert str(Fraction(1, 2) * Fraction(1, 3)) == '1/6'
      assert str(Fraction(1, 2) / Fraction(1, 3)) == '3/2'