Definition: Given a math word problem, answer the following question. You might need to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the question and then only report the final numerical answer.
Input: a number machine changes the value of the numbers placed inside it . my number machine will add 15 to a number and then subtract 6 from the sum . if i put in the number 68 what number will come out of the machine ?
Output:
77