How do I solve this problem?

Simplify the algebraic expression 8y-2(y+4)

Use mathematical induction to prove the statement is true for all positive integers n, or show why it is false. 1^2 + 4^2 + 7^2 + + (3n - 2)^2 = [n(6n^2-3n-1)/2]

Care repairs are less than or equal to $500