input: def perform_operations(operator, operand):
      """
      Given two lists: `operator` containing basic algebra operations and `operand` containing integers.
      Construct an algebraic expression using these two lists and return its result.
  
      Basic algebra operations:
      Addition ( + )
      Subtraction ( - )
      Multiplication ( * )
      Floor division ( // )
      Exponentiation ( ** )
  
      Example:
      operator = ['+', '*', '-']
      operand = [2, 3, 4, 5]
      result = 2 + 3 * 4 - 5
      => result = 9
  
      Note:
          The length of the operator list is one less than that of the operand list.
          The operand list contains non-negative integers.
          There is at least one operator in the operator list and at least two operands in the operand list.
      """
output:     expression = str(operand[0])
      for o, n in zip(operator, operand[1:]):
          expression += f" {o} {n}"
      return eval(expression)