Question 2 Simplify $7 y-8 x^{2}+6 y-2 x^{2}+3 x$

Step 1 ：The question is asking to simplify an algebraic expression. To simplify this expression, we need to combine like terms. Like terms are terms that have the same variable and exponent. In this case, the like terms are \(7y\) and \(6y\), and \(-8x^2\) and \(-2x^2\). The term \(3x\) does not have a like term, so it will remain as it is.

Step 2 ：The simplified expression by combining like terms is \(-10x^2 + 3x + 13y\).

Step 3 ：Final Answer: \(\boxed{-10x^2 + 3x + 13y}\)