#输入有其它括号,换成() equation = list(map(str,input().replace('[','(').replace(']',')').replace('{','(').replace('}',')'))) new_equation = [] for i in range(len(equation)): if i == 0: new_equation.append(equation[i]) else: if equation[i].isdigit(): if new_equation[-1].isdigit(): new_equation[-1] += equation...