(5х+6)(2х-9)+4, (6х-7)(5х+2)-9, (9х+8)(2х-9)+4, (5х+6)(2х-9)+9, (6х-7)(5х-2)+8, (2х+8)(2х+9)+5, (2х+8)(3х+9)-5, (х2-5х+9)(5х2+6х+2), (х2-5х+9)(х2-6х+2), (2а2+6а+1)(2а-8а2-3), (2а2+6а+1)(а-5а2-6), (2у+6х)(8а-6у)+7, (2у+6х)(3а-8у)-7, (2к+6у)(5к-8у)+12к, (2к+6у)(8к-5у)-12к, (-7х+4у)(2х-3у)+13, (-7х+4у)(9х-2у)-13, (8а-3)(6х-1)-6х, (8а-3)(-6х-5)+6х, (-9а-3)(5х-1)-8х+9а, (-9а-3)(7х-2)+8х-9а, (8х+6у)(2у+8х)-5х, (8х+6у)(3у+7х)+5х, (3х+5у)(-15х+5у), (11х+4у)(-5х+15у), (8х+1)(1-6х)+8, (3х+1)(1-5х)-8, (2х-5у)(6х-3у)-5х, (2х+5у)(5х-3у)+5х, (9х-4у)(-5х+9у), (9х-5у)(-4х+3у), (4х-2)(6+5х), (4х-5)(5+3х), (3х-2х2)(х2+х), (3х+2х2)(х2 +х), (-2х-7х2)(6х2+2х), (-2х-7х2)(5х2-2х), (-9х-3х2)(3х2+5х), (-9х-3х2)(5х2-3х), (3х-5х2)(2х2+9х), (3х-5х2)(х2-9х), (-8х+4х2)(7х2 -х), (-8х+4х2)(4х2 -5х), (-8а2+4х2)(7х2 –3а2)-а2, (-8а2+4х2)(7х2 +а2)+а2, (-3ха2+4ах2)(7ах2 –ха2), (-3ха2+4ах2)(5ах2 –2ха2), (ха2+4а)(ах2 –а), (ха2+4а)(2ах2 –3а), (5а2+4а)(6а2 –а).

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