# What is the standard form of a polynomial (2x^3 + x^2 − 4x) − (9x^3 − 3x^2)?

1. ( 2 x^3 + x ^2 − 4 x ) − ( 9 x^ 3 − 3 x^ 2 )
2. $\left(2 {x}^{3} + {x}^{2} + 4 x - 9 {x}^{3} + 3 {x}^{2}\right)$
3. $\left(7 {x}^{3} + 4 {x}^{2} + 4 x\right)$