Combine the algebraic expressions: \(3x^2 + 2x - 7\) and \(-2x^2 + 5x +4\).

Step 1 ：First group the like terms together: \(3x^2 - 2x^2\), \(2x + 5x\), and \(-7 + 4\)

Step 2 ：Then perform the addition or subtraction for each group: \(x^2\), \(7x\), and \(-3\)

Step 3 ：Combine all the results to form the final expression: \(x^2 + 7x - 3\)