combine like terms.\n2x^{2}+7 + 6x-1-7x - 6x^{2}+1

Explanation:

Step1: Group like - terms

$(2x^{2}-6x^{2})+(6x - 7x)+(7 - 1+1)$

Step2: Combine $x^{2}$ terms

$2x^{2}-6x^{2}=(2 - 6)x^{2}=-4x^{2}$

Step3: Combine $x$ terms

$6x-7x=(6 - 7)x=-x$

Step4: Combine constant terms

$7 - 1+1=7$

Answer:

$-4x^{2}-x + 7$