$$x^{2}-12x+20; 6x^{2}+19x+10; x^{2}+14x+33$$
$\left(x-10\right)\left(x-2\right)\left(x+3\right)\left(x+11\right)\left(2x+5\right)\left(3x+2\right)$
$\left(x-10\right)\left(x-2\right),\ \left(2x+5\right)\left(3x+2\right),\ \left(x+3\right)\left(x+11\right)$
