HELP ASAP PLEASE!!

I don’t know how to do this on Desmos, I really need some help please

Write the expression 7x^3-28xy^2 as the product of 3 factors

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)

Which rule describes the composition of transformations that maps △abc to △a”b”c