2x^3-16y^35x^2-13xy-6y^2x^3+2x^2-10x-20-3x^3-12x^2+36x9-x^2+12^xy-36y^29s(s-1)-2t(6s-2t-3)6(m-n)^2-10m+10n-4-3y^4+10y^+83x^2y+28y^2+7xy^2+12xy

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2x^3-16y^35x^2-13xy-6y^2x^3+2x^2-10x-20-3x^3-12x^2+36x9-x^2+12^xy-36y^29s(s-1)-2t(6s-2t-3)6(m-n)^2-10m+10n-4-3y^4+10y^+83x^2y+28y^2+7xy^2+12xy

2x^3-16y^35x^2-13xy-6y^2x^3+2x^2-10x-20-3x^3-12x^2+36x9-x^2+12^xy-36y^29s(s-1)-2t(6s-2t-3)6(m-n)^2-10m+10n-4-3y^4+10y^+83x^2y+28y^2+7xy^2+12xy
2x^3-16y^3
5x^2-13xy-6y^2
x^3+2x^2-10x-20
-3x^3-12x^2+36x
9-x^2+12^xy-36y^2
9s(s-1)-2t(6s-2t-3)
6(m-n)^2-10m+10n-4
-3y^4+10y^+8
3x^2y+28y^2+7xy^2+12xy

2x^3-16y^35x^2-13xy-6y^2x^3+2x^2-10x-20-3x^3-12x^2+36x9-x^2+12^xy-36y^29s(s-1)-2t(6s-2t-3)6(m-n)^2-10m+10n-4-3y^4+10y^+83x^2y+28y^2+7xy^2+12xy
1.2(X^3-8Y^3)=2(X-2Y)(X^2+2XY+4Y^2)
2.(5X+2)(X-3Y)
3.X^2(X+2)-10(X+2)=(X^2-10)(X+2)
4.-3X(X^2+4X-12)=-3(X-2)(X+6)
5.9-(X-6Y)^2=(9+(X-6y))(9-(X-9Y))
6.9S^2-9S-12ST+4T^2+6T=(3S-2T)^2-3(3S-2T)
=(3S-2T)(3S-2T-3)
7.6(m-n)^2-10(m-n)-4=(6(M-N)+2)((M-N)-2)
3XY(X+4)+7Y^2(X+4)=(3XY+7Y^2)(X+4)