（x²+x)²-26(x²+x)+120 ax+ay+bx+by-a-b x²(x²-y²)-72y⁴

Are you simplifying (X & # 178; + x) & # 178; - 26 (X & # 178; + x) + 120 = (X & # 178; + X-6) (X & # 178; + x-20) = (X-2) (x + 3) (x-4) (x + 5)
ax+ay+bx+by-a-b=a(x+y)+b(x+y)-(a+b)=(x+y)(a+b)-(a+b)=(a+b)(x+y-1)
x²(x²-y²)-72y⁴=x⁴-x²y²-72y⁴=(x²+8y²)(x²-9y²)=(x²+8y²)(x-3y)(x+3y)

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