$\frac{x}{\sqrt{x^2-x}}$

$\left(\frac{2}{5}a^6-\frac{7}{2}a^4b^2+\frac{8}{5}a^2b^4-\frac{1}{6}b\right)\left(\frac{1}{2}ab^2c\right)$

$\log\left(a\right)+x\log\left(c\right)$

$\lim_{x\to\infty}\left(1+\frac{1}{x}\right)^{\frac{1}{5}x}$

$\left(\frac{3}{4}x^3\right)^2$

$\frac{x+5}{x-5}+\frac{x-5}{x+5}=\frac{10}{3}$

$2x+1\:+\:2x-1\:are$