Answer:
-6x-5
Explanation:
6x^2-10
(5x^2+2)-(-4x^2+7)+(-3x^2-5)=
5x^2+2+4x^2-7-3x^2-5=
5x^2+4x^2-3x^2+2-7-5=
9x^2-3x^2-5-5=
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