4x 4 7 x 7 2 July 8, 2019 16 32 64 128 4x 4 x 7 )= 28 4x 4 7 x 3 2 4x 7 4x 14 7 4 x 8 )+ 1 2x (4x - 7) ^ 2 = (7x - 4) ^ 2 4 x 4 x 4 x
