Me on 2 pls with work explaining how u did it thx

Combine like terms7y^2 + 7(6y^2 − 8)

Solve the equation x/4 - 5= -8 -27 -12 -7 12

Asquare picture with sides of 32 inches is to be mounted on a square mat with sides of 52 inches. find the area of the mat that will remain uncovered by the picture.