4 x 2 ) 18 1 2x 10 July 8, 2019 16 32 64 128 4 x 2 )+ 18 1 2x 10 4 x − 2 )+ 18 12x 10 4 x 2 x 18 18 - 4 x 2 4 x 181 4 x 2 + 2 x 101 - 100