def test_1(self): self.assertEqual(polishNotation.checkio("(a+(b*c))"), "abc*+")
def dtest_0(self): self.assertEqual(polishNotation.checkio("a*b"), "ab*")
def Dtest_3(self): self.assertEqual(polishNotation.checkio("((a+t)*((b+(a+c))^(c+d)))"), "at+bac++cd+^*")
def Dtest_4(self): self.assertEqual(polishNotation.checkio("a+b*c+d"), "abc*+d+")
def Dtest_2(self): self.assertEqual(polishNotation.checkio("((a+b)*(z+x))"), "ab+zx+*")