Simplify the expression by combining like terms:
3x^2 - 2x - x^2 + 3x2x^2 + x
Therefore, the simplified expression is 2x^2 + x.
Simplify the expression by combining like terms:
3x^2 - 2x - x^2 + 3x
2x^2 + x
Therefore, the simplified expression is 2x^2 + x.