$2\times\:\left(\frac{4}{3}-\frac{5}{6}\right)$

$\int_2^{\infty}\left(\frac{x}{\left(1+x^2\right)}\right)dx$

$\frac{y^{-2}}{3y^4}$

$x^2+4x+5=0$

$12m+3n+5p+8n+4m+2n$

$\left(x^{3n+2}\right)\left(x^{3n-1}\right)$

$\int_{-2}^4\left(\frac{1}{\left(x+9\right)\left(x^2+16\right)}\right)dx$