You are given a math word problem and you are supposed to apply a single mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report final the numerical answer.

Example Input: Theresa has 32 crayons . Janice has 12 crayons . She shares 13 with Nancy . How many crayons will Theresa have ?
Example Output: 19

Example Input: There were originally 20817 houses in Lincoln County . During a housing boom , developers built 97741 more . How many houses are there now in Lincoln County ?
Example Output: 118558

Example Input: 64 children were riding on the bus . At the bus stop , some more children got on the bus . Then there were 78 children altogether on the bus . How many children got on the bus at the bus stop ?
Example Output:
14