text: import re
  
  
  class Solution(object):
      def complexNumberMultiply(self, a, b):
          """
          :type a: str
          :type b: str
          :rtype: str
          """
          a, ai, b, bi = map(int, re.findall("-?\d+", a+b))
          return "%d+%di" % ((a * b - ai * bi), (a * bi + ai * b))
  