$\left(\frac{1}{4}a^{2}-\frac{5}{2}a\right)+\frac{1}{2}a$

$\left(y+x+2\right)dx\:+\:dy\:=0$

$\frac{x^2+4x-5}{x^2-2x-3}+\frac{2}{x+1}$

$\lim_{x\to0}\left(\frac{\sqrt[3]{8+x}}{x}\right)$

$\frac{\left(b+1\right)}{\left(b+1\right)}$

$17-6m^3n^2+8n^2m^3+6-m^3n^2$

$\left(\frac{9}{5}-\frac{-12}{5}-\frac{1}{5}\right)$