You are given a math word problem and you are supposed to apply multiple mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.
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Question: Keith found 6 seashells , Jessica found 8 seashells , and Tim found 7 seashells on the beach . When they cleaned them , they discovered that 3 were cracked . How many seashells did they find together ?

Answer: 21


Question: Oliver had 11 socks . If he threw away 4 old ones that did n't fit and bought 26 new ones , how many socks would he have ?

Answer: 33


Question: A teacher had 38 worksheets to grade . If she graded 4 , but then another 15 were turned in , how many worksheets would she have to grade ?

Answer:
49