¿ayuda con estos ejercicios?

(ax+1 – 2bx-1)( 2bx-1 + ax+1)

(a – 11)(a + 10)

(x3 + 7)( x3 + 6)

(2m + 9) (2m – 9)

(a + 1)(a + 2)(a – 1)(a – 2)

(10x3 – 9xy5)2

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