$\log_{10}\left(5\right)+\:\log_{10}\left(\log_{10}\left(x\right)\right)\:=\:1.$

$\lim_{x\to\infty}\left(\frac{5n}{ln\left(x\right)}\right)$

$-2\\:-6y\\:+\\:8x\\:+\\:4y$

$20x+1>5$

$\tan\left(70\right)\frac{300}{y}$

$\left(12-3\right)-\left\{1-\left(2-6\right)\right\}$

$4a^2+12ac+9c^2$