instruction:
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.
question:
There are 7.75 gallons of water in Becky 's fish tank . If Becky adds 7 gallons more , how many gallons will there be in all ?
answer:
14.75

question:
Jazmin had 1209 dolls and Geraldine had 2186 dolls . If they put their dolls together , how many would they have ?
answer:
3395

question:
A pet store had 15 siamese cats and 49 house cats . During a sale they sold 19 cats . How many cats do they have left ?
answer:
45