You are given a math word problem and you are supposed to only use subtraction on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Context: Next on his checklist is wax to stick the feathers together. If the feathers require 166 g of wax and right now he has 20 g 

 Question: How many more grams of wax does he need?
146

Context: After a typhoon, 2 trees in Haley's backyard died. If she had grown 11 trees initially 

 Question: How many more trees survived the typhoon than those that died?
7

Context: There are 22 different books and 10 different movies in the ' crazy silly school ' series. If you read 12 of the books and watched 56 of the movies 

 Question: How many more books do you still have to read?

10