A(4 8) b(7 2) c(- 8 4) d(5 - 9) July 8, 2019 16 32 64 128 2 + (- 8 + c) 3 + (- d - 5) 4 + (a - 9) A(4 7 8) b(-1 13 0) c(2 4 9) d(1 8 9)
