$\lim_{x\to0}\left(4sinx\right)^{2tanx}$

$3x^2+12x-13>0$

$\left(2xy+z\right)^2$

$\left(v+5u\right)^3$

$\lim_{x\to-3}\left(\frac{x^2-2x-15}{x+3}\right)$

$\lim_{x\to\infty}\left(\frac{lnx^4}{ln\left(x+1\right)^4}\right)$

$\frac{1}{\left(x^2-25\right)\left(x-2\right)\left(x+5\right)}$