-9y+[7+(6y-7)]

Question

what is the algebraic expression in simplest form?

Answer 1

It is either a typo or the brackets are unnecessary

-9 y + 7 + 6 y - 7 = -3 y

Answer 2

-9y+[7+(6y-7)]
-9y+[7+6y-7]
-9y+7+6y-7 = -3y.