$\frac{x^5}{x^2+1}$

$\sqrt[3]{\frac{y^2}{y\frac{4}{5}}}$

$\int\left(\frac{7}{1+16x^2}\right)dx$

$\frac{2x^3}{\frac{x}{3}}$

$5\left\{a\right\}2\left\{a\right\}\left\{c\right\}3\left\{a\right\}+8$

$\int\left(sin\left(5x-7\right)\right)dx$

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