Given a math word problem, answer the following question. You might need to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the question and then only report the final numerical answer.

at the arcade billy had won 48 tickets . after buying a yoyo he had 32 tickets left . how many tickets did the yoyo cost ?
16

a florist needed to use 2 pounds of fertilizer for 9 days and then on the final day use the normal amount plus another 4 pounds . how many pounds of fertilizer will she use all together ?
22

at the fair amy started with 33 tickets and then bought 21 more . how many tickets did amy have total ?
54