Which products are correct? A)
(10)(2)-12) = 240
B)
(-9)(-8)(2) = 144
(-10)(7)(3) = -210
D)
(-5)(-3)(6) = -90
E)
(-1)(-1)(-1)(-1) = 1

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.