(1)2(a²b+2b³-ab²)+3a³-(2a²b-3ab²+3a³)-4b³(2)(4x-3y)-[2(x-1)+2y-3](3)(2a-5b)-{-3b-2[4a-2(3a-b)]}

(1)2(a²b+2b³-ab²)+3a³-(2a²b-3ab²+3a³)-4b³(2)(4x-3y)-[2(x-1)+2y-3](3)(2a-5b)-{-3b-2[4a-2(3a-b)]}
(1)2(a²b+2b³-ab²)+3a³-(2a²b-3ab²+3a³)-4b³
(2)(4x-3y)-[2(x-1)+2y-3]
(3)(2a-5b)-{-3b-2[4a-2(3a-b)]}

(1)2(a²b+2b³-ab²)+3a³-(2a²b-3ab²+3a³)-4b³(2)(4x-3y)-[2(x-1)+2y-3](3)(2a-5b)-{-3b-2[4a-2(3a-b)]}
(1)2(a²b+2b³-ab²)+3a³-(2a²b-3ab²+3a³)-4b³
=2a²b+4b³-2ab²+3a³-2a²b-3ab²+3a³-4b³
=0
(2)(4x-3y)-[2(x-1)+2y-3]
=4x-3y-[2x-3+2y-3]
=4x-3y-2x+2-2y+3
=2x-5y+5
(3)(2a-5b)-{-3b-2[4a-2(3a-b)]}
=2a-5b-{-3b-2[4a-6a+2b]}
=2a-5b-{-3b-8a+12a-4b}
=2a-5b+3b+8a-12a+4b
=2b-2a
有问题随时问吧,在我睡着之前.