No rush but can somebody help me ASAP I’ve been missing days of school and I’m behind !

Tanya has $42 to spend at the dolphin island store. tshirts sell for $7 each and a pair of sunglases sells for $6.tanya buys 3 tshirts. how many pairs of sunglases can she buys with the amount of money she has left

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show

I’ve been trying all day to figure this puzzle out. i need the work for it aswell. it is a factoring polynomials tarsia. the image is below.