$-30+15r$

$\left(\sqrt{x+3}\right)^2+6-5\cdot\:\sqrt{x+3}$

$y'=y+\sqrt{y}$

$\lim_{x\to\infty}\left(\sqrt[3]{\left(x^3-3x^2\right)}-x\right)$

$^{243x^{15}+1024}$

$\left(\frac{5}{4}x-2\right)^2$

$\lim_{x\to\infty}\left(\frac{n\cdot\left(log\left(n\right)\right)^2}{n^{\left(\frac{3}{2}\right)}\cdot log\left(n\right)}\right)$