$-394+-65$

$\left(-57\right)+\left(-867\right)-\left(49\right)$

$\lim_{x\to-\infty}x+\frac{1}{x}$

$\frac{3}{2}x+5<\frac{1}{3}-\frac{x}{6}$

$\left(sec\:\infty-tan\infty\right)^2=\:\frac{\left(1-\:sin\:\infty\right)}{\left(1+sin\infty\right)}$

$-9x^2-24x-16>0$

$-7.\left(3\:-\:6\right)\:$