Помогите срочно нужно!

(x^2+3x-2)(x^2-9x-2)+8x^2<=0</p>

x^4+9x^3-2x^2+3x^3+27x^2-6x-2x^2-18x+4+8x^2<=0</p>

x^4+12x^4+31x^2-24x+4<=0</p>

x^2(x^2+7x-2)+5x(x^2+7x-2)-2(x^2-7x-2)=0

(x^2+7x-2)*(x^2+5x-2)<=0</p>

0}} \right." alt="\left \{ {{x^2+7x-2<=0 \atop {x^2+5x-2=>0}} \right." align="absmiddle" class="latex-formula">

0 \atop {x^2+7x-2<=0}} \right." alt="\left \{ {{x^2+7x-2=>0 \atop {x^2+7x-2<=0}} \right." align="absmiddle" class="latex-formula">

x∈[ $\frac{- 7 + \sqrt{57}}{2}; \frac{- 5 + \sqrt{33}}{2}$ ]

$\frac{- 7 + \sqrt{57}}{2}$ ≈ - 7.27492

$\frac{- 5 + \sqrt{33}}{2}$ ≈ - 5.37228

Целые x: - 7; - 6

Сумма всех целых x:

-7+(-6) = - 13