\(=-6x^2\left(x^2+10x+25\right)-x^2+6x-9+2x^4-3x^2-2-4x^2\left(9x^2-24x+16\right)\)
\(=-6x^4-60x^3-150x^2-x^2+6x-9+2x^4-3x^2-2-4x^2\left(9x^2-24x+16\right)\)
\(=-4x^4-60x^3-154x^2+6x-11-36x^4+96x^3-64x^2\)
\(=-40x^4+36x^3-218x^2+6x-11\)
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