Teacher: You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.
Teacher: Now, understand the problem? If you are still confused, see the following example:
Last year , 90171 people were born in a country , and 16320 people immigrated to it . How many new people began living in the country last year ?
Solution: 106491
Reason: Total people living in the country = born - immigrated = 90171 - 16320 = 106491

Now, solve this instance: Melissa has 70 oranges . John takes 19 away . How many oranges will Melissa have ?
Student:
51