(-2×2-2x+1)+(-8×2-7)

Remove parentheses.

-2×2-2x+1-8×2-7

Subtract 8×2 from -2×2.

-10×2-2x+1-7

Subtract 7 from 1.

-10×2-2x-6

Add (-2x^2-2x+1)+(-8x^2-7)

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# Add (-2x^2-2x+1)+(-8x^2-7)

(-2×2-2x+1)+(-8×2-7)

Remove parentheses.

-2×2-2x+1-8×2-7

Subtract 8×2 from -2×2.

-10×2-2x+1-7

Subtract 7 from 1.

-10×2-2x-6

Add (-2x^2-2x+1)+(-8x^2-7)