Factoring: x^3-9x+8

Factoring (m^2-1)(n^2-1)+4mn

x^4-7x^2+1

(a+b+c)^3

(a+b+c)^3-a^3-b^3-c^3

(x^2-7x)^2+10(x^2-7x)-24

x^2+y^2-x^2y^2-4xy-1

5+7(a+1) -6(a+1)^2

x^8+19x^5-216x^2

x^4+2x^2-8

(x-1)(x-2)(x-3)(x-4)-48

(x^2+x)(x^2+x-1)-2