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.

todd has some gum . steve gave him 16 more pieces of gum . now todd has 54 pieces of gum . how many pieces did todd have to start with ?
38

lou 's shoes must sell 80 pairs of shoes each month . they sold 27 pairs last week and 12 pairs this week . how many more pairs of shoes must they sell ?
41

paige had 43 math problems and 12 science problems for homework . if she finished 44 of the problems at school how many problems did she have to do for homework ?
11