2 x 2 3 4 )= 13 July 8, 2019 16 32 64 128 1 2 13 x 2 3 4 1 2 13 x 2 3 4 bolt 5 2 3 x 4 2 13 5x 2 3 x 2 2x )+ 3x 13 4 2 x 3 )/ 7 x 2 13x 4 21 2 x 13 2^x + 8^x = 130 2 x 2 5