def mathtricks():
    for i in range (10):
        x =  3**i
        y = 3**-i
        z = (-3)**i
        aa =  -3**i

        print "   3**", i , "  is displayed as  ", x
        print "   3**", -i , " is displayed as  ", y
        print " (-3)**", i , " is displayed as  ", z
        print "  -3**", i , "  is displayed as  ", aa

mathtricks()