$\frac{\left(cot\left(30\right)-tan\left(30\right)\right)}{\left(csc\left(120\right)+cot\left(120\right)\right)}$

$-x^2+2x-10$

$\lim_{x\to-3}\left(\frac{\left(x-3\right)}{\left(x^2-9\right)}\right)$

$9x^2<x^2+14$

$\lim_{x\to\infty}\left(-8ln\left(1+\frac{7}{4x}\right)\right)$

$9y+y$

$\lim_{x\to0}\left(\frac{\ln\left(x^4+3\right)}{13x+1}\right)$