Simplify the following expression.

(6x2 - 6x - 7) + (4x2 + 2)

A. 10x2 - 5

B. 2x2 + 6x - 9

C. 10x2 - 6x - 5

D. 10x2 + 6x - 5

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Simplify - 6+[4 - (*-2) ]