opers=[int.__add__, int.__sub__,int.__div__,int.__mul__]
if test in xrange(1,5):op=opers[test+1]

#!/usr/bin/python
#coding=utf-8
import urllib, urllib2, re

def calc():
    oper = raw_input('Operation (+, -, *, /, %, ^, choose, % of, th root of):')
    x = raw_input('First operand:')
    y = raw_input('Second operand:')

    try:
        req = urllib2.Request("http://www.google.com/search?q=" + urllib.quote("%s %s %s" % (x, oper, y)), None, {'User-agent': 'Mozilla/5.0'})
        result = re.findall(r"<img src=/images/calc_img\..+?<b>(.+?)<", urllib2.urlopen(req).read())
        print result[0]
    except (IOError,IndexError):
        print 'Error'

while 1: calc()