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.

Example input: for a birthday party cody bought 30 regular sodas and 5 diet sodas . if his fridge would only hold 7 on each shelf how many shelves would he fill up ?
Example output: 5
Example explanation: total sods = 30+5 = 35, total shelves filled = total soda/7 = 35/7 = 5
Q: bianca had 45 coloring books . if she gave away 6 of them but then bought 20 more how many would she have total ?
A:
59