先化简,再求值:2(a²b+2b³-ab²)+3a³-(2ba²-3ab²+3a³)-4b³
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先化简,再求值:2(a²b+2b³-ab²)+3a³-(2ba²-3ab²+3a³)-4b³先化简,再求值:2(a
先化简,再求值:2(a²b+2b³-ab²)+3a³-(2ba²-3ab²+3a³)-4b³
先化简,再求值:2(a²b+2b³-ab²)+3a³-(2ba²-3ab²+3a³)-4b³
先化简,再求值:2(a²b+2b³-ab²)+3a³-(2ba²-3ab²+3a³)-4b³