instruction:
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.
question:
Iesha has 58 books . 19 are about school and the rest are about sports . How many books about sports does Iesha have ?
answer:
39


question:
Isabella ’ s hair is 18 inches long . If she gets a haircut and now her hair is 9 inches long , how much of Isabella ’ s hair got cut off ?
answer:
9


question:
13 ducks are swimming in a lake . 20 more ducks come to join them . How many ducks are swimming in the lake ?
answer:

33