$5+4+4$

$\lim\:_{x\to\:\frac{5\pi\:}{4}}\left(\frac{\left(cot\:x-1\right)}{\left(sin\:x\:-\:cos\:x\right)}\right)$

$\frac{4}{x\left(x-2\right)}$

$\lim_{x\to\infty}\left(\frac{6^x+7}{6x^3+x^2+9x+1}\right)$

$\frac{senx+cosxtanx}{cosx}$

$\left(2x+2x\right)+40$

$-3+\left(-7\right)+8+5+\left(-3\right)+4+\left(-2\right)$