$x^7+x^{6\ }-11x^5+3x^4-13x^3+19x^2-56$

$x^7+5x^{2\ }-12x^{ }$

$x^7+5x^{6\ }-11x^5$

$x^7+19x^2-56$

$100x^6-180x^4y^5+81x^2y^{10}$

$100x^6+180x^4y^5+81x^2y^{10}$

$20x^6-19x^4y^5+18x^2y^{10}$

$20x^6-x^4y^5+18x^2y^{10}$

$36x^4-m^4x^2$

$12x^2+2m^2x^{ }$

$12x^2$

$36x^4$

$8x^3+36x^2y+54xy^2+27y^3$

$8x^3+27y^3$

$6x^3+9y^3$

$8x^3-36x^2y+54xy^2-27y^3$

$x^6y^6+2x^3y^3-48$

$2x^3y^3+2$

$x^6y^6-48$

-2

$25+35x^5+49x^{10}$

$25+49x^{10}$

$130+350x^{10}$

$120-350x^{10}$

$31a^2x\left(3axy-2x^2y^2-4\right)$

$a^2x\left(93axy-62x^2y^2-124\right)$

$93axy$

$31\left(3a^3x^2y-2a^2x^3y^2-4a^2x\right)$

$\left(a+x\right)\left(3a-7b^2\right)$

$6a^3x-14ab^4x$

$6a^3x$

$-14ab^4x$

$\left(20x^5+1\right)^2$

$\left(20x^5-1\right)^2$

$441x^{15}$

$441x^{50}$

$\left(a^{2n}-15b^2\right)\left(a^{2n}+15b^2\right)$

$225ab$

$-224a^{4n}b^4$

$\left(a^{2n}-15b^2\right)^2$

$\left(m-11\right)\left(m-1\right)$

$22m^2$

$\left(m-12\right)\left(m+1\right)$

$\left(m+11\right)^2$

$\left(n+3\right)\left(4n-11\right)$

$\left(2n-11\right)^2$

$5n-33$

$n\left(4n+1\right)-33$

$\left(4x^3-5y^4\right)^3$

$\left(4x^3-5y^4\right)^2$

$\left(4x^3-5y^4\right)^{ }\left(4x^3+5y^4\right)^{ }$

$xy\left(64x^8-125y^3-240x^5y^3+300x^2y^7\right)$