\(4x^{3}\) - \(3x^{2}\) + x + \(3x^{3}\)
First, gather the like terms. / Your problem should look like: (\(4x^{3}\) + \(3x^{3}\) ) - \(3x^{2}\) + x
Second, simplify. / Your problem should look like: \(7x^{3}\) - \(3x^{2}\) + x
Answer: \(7x^{3}\) - \(3x^{2}\) + x
