Question 921609


{{{(x^4+3x^2+1)(4-x^4)}}}

{{{x^4*4+x^4*(-x^4)+3x^2*4+3x^2(-x^4)+1*4-1*x^4}}}

{{{4x^4-x^8+12x^2-3x^6+4-x^4}}}

{{{-x^8-3x^6+3x^4+12x^2+4}}}