(3x+2)(-x^6+3x^5)+(3x+2)(-2x^6+x^5)+(x+1)(3x^6-4x^5) 與下列哪個式子相同?
(3x+2)(-x^6+3x^5)+(3x+2)(-2x^6+x^5)+(x+1)(3x^6-4x^5)
(3x^6-4x^5)(2x+1)
(3x^6-4x^5)(2x+3)
-(3x^6-4x^5)(2x+1)
-(3x^6-4x^5)(2x+3)