1) (4x)³+3·(4x)²·0.1y+3·4x·(0.1y)²+(0.1y)³=64x³+4.8x²y+1.2xy²+0.001y³ 2) (0.2a)³+3·(0.2a)²·10b+3·0.2a·(10b)²+(10b)³=0.008a³+1.2a²b+60ab²+1000b³ 3) (0.3b)³-3 ·(0.3b)² ·10c+3·0.3b·(10c)²-(10c)³=0.027b³-2.7b²c+90bc²-1000c³