因式分解(^代表几次方,) ①x^3+6x+1+6 ②2x^4-x^3-6x^2-x+2 ③(x-y)^2-3(x-y)-10 ④4a^2-b^2+4a-2b⑤x^2-2xy+y^2-2x+2y-3 ⑥x^5+x+1⑦(x+y-2xy)(x+y-2)+(xy-1)^2⑧x^2-y^2-2x-4y-3⑨7x^2-19x-6⑩x^3+(2a+1)x^2+(a^2+2a-1)x+a^2-1x是 唉可思

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