def cal(a, o, b): a, b = str(a), str(b) u = a + o + b return eval(u) s_ = input() n = len(s_) all_list = [] num_list = [] op_list = [] search_digit = True i = 0 while i < n: if s_[i] in "()[]}{": all_list.append(s_[i]) i += 1 continue if ...