4 5 5 х 3 1 2 July 8, 2019 16 32 64 128 4 5 5 x 3 1 2 5 4 5 3 1 2 4 5 6 x 3 1 2 4 5 8 x 3 1 2 4 5 5 tetramethyl 1 3 2 dioxaborolane 4 + 4 =5 - 5 4 - х = - 3 5
