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.

[Q]: There are 7 crayons in the drawer . Mary took 3 crayons out of the drawer . How many crayons are there now ?
[A]: 4


[Q]: Josh had 16 marbles in his collection . He lost 7 marbles . How many marbles does he have now ?
[A]: 9


[Q]: Arthur removes 4 pencils from a jar . There were originally 87 pencils in the jar . How many pencils are left in the jar ?
[A]:
83