$\frac{dq}{dt}=\frac{q^2}{t^2}$

$\left(7m-6\:\right)\left(7m+1\right)$

$\frac{n+4}{n^2\cdot\:\:3^n}\left(x-2\right)^n\:$

$\lim_{x\to\infty}\left(\ln\left(8x\right)-\ln\left(x+7\right)\right)$

$\left(3x-5\right)\left(3x+2\right)$

$23x^2\cdot x$

$\int x\:\arcsec\left(x^2\right)dx$