Remove parentheses.

Add and .

Subtract from .

Add and .

Simplify 7x^2-5x-6+(x^2-2x+3)

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# Simplify 7x^2-5x-6+(x^2-2x+3)

Remove parentheses.

Add and .

Subtract from .

Add and .

Simplify 7x^2-5x-6+(x^2-2x+3)