$\lim_{x\to6}\left(\frac{x^2+13x+42}{x+6}\right)$

$v^2+8v=15$

$\left|\left(-8\right)+\left(-5\right)\right|-\left|\left(-3\right)-\left(+5\right)\right|$

$x^2-6x+14$

$\frac{n^6+1}{n^2+1}$

$a\left(b-6\right)+9\left(b-6\right)$

$\left(11axz^2y^2+w^4\right)\left(11axz^2v^2-w^4\right)$