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.
One example is below.
Q: robin bought 11 sodas for her and her friends . if they only drank 3 of them how many extras did she have ?
A: 8
Rationale: Extra sodas is total - drank = 11-3 = 8
Q: vincent has learned the words to 56 songs . he learned 18 more songs at summer camp . how many songs does vincent know now ?
A:
74