Please help I will mark you BRAINLIST help me with 17, 18, 19 and 20 please I need this thank you!!

Interpret the following expression (5y^2-7)^3/(2y)^2

Write a function rule for the table

At the beginning of the month, alexa’s bank account contained $4329.97. she then made two deposits of $452.28 each and a withdrawal of $279.34. she then went to the store and bought the new iphone x for $1,015 plus 6% sales tax. how much money does she have in her account now?