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.
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Question: Tim had 7 quarters and 9 nickels in his bank . His dad gave him 3 nickels and 5 pennies . How many nickels does Tim have now ?

Answer: 12


Question: Sam grew 4 watermelons , but the rabbits ate 3 watermelons . How many watermelons does Sam have ?

Answer: 1


Question: Charles has 25 Skittles . Diana takes 7 away . How many Skittles will Charles have ?

Answer:
18