$\lim_{x\to0}\left(-\ln\left(x\right)\right)^x$

$-99\cdot31+-1\cdot31$

$\left[-5\:-\:\left(8\:-\:3\:-\:7\right)\right]$

$6 x ^ { 2 } - m ^ { 2 } x ) ( 6 x ^ { 2 } - m ^ { 2 } x$

$\lim_{x\to\infty}\left(\frac{x^{2}-1}{x^{2}-2|x-1|-1}\right)$

$x^2-2x+1=15$

$4\left(4b+5\right)$