$\lim_{x\to0}\left(\frac{x}{\sqrt{3+x}-\sqrt{3}}\right)$

$13\ln\left(x\right)$

$\frac{2ad^2}{4c}\cdot\frac{6bc^3}{8d}$

$\lim_{a\to1}\left(\frac{sin2\left(a-1\right)}{\left(a^2-2a+1\right)\left(\frac{\cot\left(a-1\right)}{2}\right)}\right)$

$26c^{2\:}\:+39c$

$x+y-2x-2y$

$\int\frac{16s-4}{4s^2-2s+3}ds$