3 5y 4 2y 5 July 8, 2019 16 32 64 128 3 y 3 )+ 5y 4 2y 1 )+ 5 4 2y 5 )= 3 5y 2 5x 2y 3 )( 4x 5y 4 4 2y 1 )= 3 5y 2 )- 5