1) 4a(a²-2a+3) = 4a³-8a²+12a

2) -3b²(4b³-2b²+3b-8) = -12b⁵+6b⁴+3b³+24b²

3) (3x²-4x+12)*(-0,1x³) = 0,3x⁵+0,4x³-1,2³

4) (p²-9p³+7p-1) * 3p⁴ = 3p⁶-27p⁷+21p⁵-3p⁴

5) 7ab(2a²b-3ab²-3a³) = 14a³b²-21a²b³-21a⁴b