Answer:
Don't forget to close any parentheses you open. Other then that everything looks fine, I just polished it a little bit
Step-by-step explanation:
name = input("What is your first name? ")
print("Hello", name)
age = int(input("How old are you? "))
print("In 10 years you will be", (age+10))
print("In 20 years you will be", (age+20))
print("5 years ago you were", (age-5))