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8x-12x²+4-2x³+3x⁴-x²-2x⁴-x²+3x+2=
=x⁴-2x³-14x²+11x+6
(4-x²)*(2x-3x²+1)-(2x⁴+x²-3x-2)= 8x-12x²+4-2x³+3x⁴-x²-2x⁴+x+3x+2=
=x⁴-2x³-11x²+12x+6
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8x-12x²+4-2x³+3x⁴-x²-2x⁴-x²+3x+2=
=x⁴-2x³-14x²+11x+6
(4-x²)*(2x-3x²+1)-(2x⁴+x²-3x-2)= 8x-12x²+4-2x³+3x⁴-x²-2x⁴+x+3x+2=
=x⁴-2x³-11x²+12x+6