(2P+3) (2P-4) (2P-5)
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=2p(2p-4)+3(2p-4)(2p-5)
=4p²-8p+6p-12(2p-5)
=4p²-2p-12(2p-5)
=4p²(2p-5)-2p(2p-5)-11(2p-5)
=8p³-20p²-4p²+10p-22p+55
=8p³-24p²-12p+55
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