(х-1)(х²+1)(х+1)-(х²+2)²+4(х²-3)=(x²-1)(x²+1)-(x⁴+4+4x²)+4x²-12=
=x⁴-1-x⁴-4-4x²+4x²-12=-1-4-12=-17
(х²+4)²-(х-4)(х²+16)(х+4)-8(х²+5)=x⁴+16+8x²-x⁴+256-8x²-40=232
(х-1)(х²+1)(х+1)-(х²+2)²+4(х²-3)=(x²-1)(x²+1)-(x⁴+4+4x²)+4x²-12=
=x⁴-1-x⁴-4-4x²+4x²-12=-1-4-12=-17
(х²+4)²-(х-4)(х²+16)(х+4)-8(х²+5)=x⁴+16+8x²-x⁴+256-8x²-40=232