Find out error to run this program: Sum two number without using plus

Question

def sum_without_oper ():
a=int(input())
b=int(input())
c=[]
c.append(a,b)
result=sum(c)
return result

Answer 1

def sum_without_oper ():
a=int(input())
b=int(input())
c=[]
c.append(a)
c.append(b)
result=sum(c)
return result
print(sum_without_oper())

Answer 2

Usually it's quite helpful to read what the interpreter says if you try to run the code 🤓

IndentationError in line 2: "expected an indented block"

TypeError in line 5: "append() takes exactly one argument (2 given)"